At the end of September 2025, Pakistan announced in a high-profile manner the delivery of the first batch of "rare earth concentrates" to the United States, including neodymium, praseodymium and other elements, and said it had signed a US$500 million mineral agreement with the United States.
For a while, the public opinion was roaring, and even there were voices saying that "the Pakistani side uses Chinese technology to deliver rare earth to the United States, triggering Chinese counter-reaction".
Pakistan does have certain rare earth deposits, but its processing capacity is extremely limited. At present, Pakistan can only carry out primary crushing and simple enrichment, and produce "rare earth concentrated ore" with a purity of about 60-90%-this is just a symbolic transaction of primary raw materials, far from reaching the industrial application standard.
What the United States really needs is high-purity rare earth metals or oxides with a purity of "four nines" (99.99%) or even "six nines" (99.9999%), which are used to manufacture F-35 fighter magnets, AI chip etching materials, Electric vehicle motors, etc.
These high-end products, Pakistan can not produce at all, only China in the world.
More importantly, although the equipment used by the Pakistani side is partly from China-Pakistan economic cooperation projects, China has never transferred core purification technology.
As China has made clear: for strategic security reasons, since 2010, key technologies for rare earth refining have been included in the national control list of sensitive objects.
What the Pakistani side has gained is only basic mining technology, with a purity of up to about 90%, with neither military value nor high-tech use.
The so-called "Rare-Earth Cooperation" is the political momentum carried out by Pakistan under the pressure of foreign debt to attract U.S. capital - sending a few kilograms of mineral samples, pulling several trucks of crude mines, creating the illusion of "alternating China", but can not shake the global supply chain pattern.
Rare earth elements are widely distributed all over the world, with abundant reserves in the United States, Australia, Vietnam, Brazil and other places. What is really scarce is not ore, but the refining ability to convert ore into high-purity materials.
In this link, China has near-monopoly "technological hegemony."
[The truth about the rare earth game: There is no shortage of minerals in the world, but China's unique "purification black technology"]
The core of the technology is derived from the "series extraction theory" breakthrough by Xu Xia Cheng and Ms. Cao Xia Duo academicians in 1975. before this, the international mainstream adopted the ion exchange method or graded crystallization method, low efficiency, high cost, poor purity (only 90% of rare earth).
Xu Guangxian and his wife achieved continuous, low-cost, and high-purity separation in one fell swoop. The purity of light rare earths directly jumped to 99.99%, and the processing efficiency increased by 10 times. The cost was only 1/10 of that in the West.
More importantly, although this technology is public, but the process details belong to "black technology": a complete set of production lines, requiring more than 30 levels or even 300 levels of extraction process, each level requires accurate control of flow, acidity, comparison and hundreds of parameters, and needs to be adapted to different mineral impurities.
After 40 years of production practice, Chinese rare-earth enterprises have accumulated a huge amount of experience data and formed a difficult "process database" to replicate, while the West has long abandoned the domestic refining system due to long-standing reliance on China's low-cost supply.
Today, the largest rare-earth enterprise in the United States, MP Materials, refining purity is still at 99.1% – 99.9%, heavy-earth separation capacity is almost zero, far from reaching the level of China's first industrial line 50 years ago.
Because the essence of the rare earth game is not the dispute for resources, but the generation difference of "engineering civilization".
The rare earth industry is “chemical engineering industry”, not “mining industry”
Global public opinion often mistakenly believes that the dispute over rare earths only lies in "who owns the mine", but in fact it is a big mistake. Rare earth elements are not rare in the earth's crust-cerium is more abundant than copper, and yttrium is more common than lead.
The real bottleneck lies in how to separate 16 rare earth elements with extremely similar chemical and physical properties (promethium and Pm are almost non-existent in nature) from mixed ores one by one and purify them to the industrially usable standard of 99.9999%(6N level).
This process does not rely on excavators, but on thousands of chemical reactions, fluid mechanics calculations and environmental protection engineering collaboration. It is a typical high-end chemical engineering system.
For example, if the purity of magnesium is less than 99.99%, the magnet will rapidly demagnetize at high temperatures, and the fighter engine will not be stable.
This extreme requirement for purity determines that the value of rare earth is not in the mineral itself, but in the separation of the purification capacity. That is why, although the United States owns the world's second-largest rare earth mine - the "Mountains" mine in California, it still needs to process 92% of the mineral to China - there are no mines "refined", equivalent to no mines.
[China's refining technology: from "cascade extraction" to closed loop of the entire industry chain]
China's core breakthrough in the purification of rare earth is derived from the "series extraction theory" created by the team of academicians in 1975, the technology achieved efficient separation of elements through multi-level solvent extraction (light rare earth needs more than 30 degrees, heavy rare earth such as uranium, uranium needs 90-100 degrees).
But the essence of the final industry is not in the principle (book can be checked), but in the industrial realization: each level of extraction needs to accurately control the flow, acidity, comparison, temperature and other hundreds of parameters, and needs to dynamically adjust the process for different minerals (fluorocarbonate ore, single stone, ion absorption ore).
Each mineral's element distribution ratio, impurities composition, embedded grains are different, and the corresponding process route, pharmaceutical formula, extraction level number and even equipment parameters need to be "customized".
After nearly 50 years of accumulation, China has built the most complete rare earth industry chain in the world:
Ore decomposition: using concentrated sulfuric acid roasting method and supporting corrosion-resistant roasting kiln;
Separation extraction: use of special extractors, with centrifugal extraction tanks, intelligent mixing equipment;
Metal purification: high-purity rare earth metals are produced by molten salt electrolysis or vacuum thermal reduction;
Product processing: manufacture end products such as titanium magnets, laser crystals.
There is also China’s original acid wastewater recycling technology, which allows 5–6 tons of radioactive wastewater generated per tonne of rare earth oxides to 95% resource recycling, taking into account environmental protection and cost.
In contrast, due to strict environmental regulations in the United States, the cost of building a self-built refinery is as high as US$2 billion, the cycle time exceeds 10 years, and it still cannot break through the bottleneck of heavy rare earths purification.
[Technology cannot "poach" people and copy them: Experience lies in the minds of engineers]
Some people often fantasize about quickly mastering rare earth technology by "digging a few Chinese engineers" or "buying a few process documents", which is really naive. The real barrier to rare earth separation lies not in patents or equipment, but in the "tacit knowledge" scattered in the minds of tens of thousands of technicians.
Writing in the book is knowledge: such as "series extraction requires multi-level operations";
What is written in internal documents is technology: such as "the ratio of P507 extractant is 30% aviation kerosene + 70% organic phase";
What grows in the mind of engineers is the key process and experience: for example, "When the thorium content of the ore exceeds 0.5%, the stripping step needs to be added at the 23rd stage, and the flow rate should be reduced by 15%".
In this industrial chain with hundreds of processes, each technician only has a short experience in his position:
Processors are familiar with the ratio of flotation reagents, extractors are proficient in the flow control of certain two levels, and electrolysers are familiar with the metal precipitation rules at specific current densities...
This knowledge is highly fragmented and situational, and relies on long-term practical accumulation.
Even if foreign countries poach a few engineers, the results are only sporadic pieces of the "process puzzle", which can neither restore the overall process nor cope with the ever-changing fluctuations of mineral sources and equipment adaptation problems in actual production.
Because of this, the rare earth industry cannot be achieved quickly by "talent transplant", but must rely on a complete industrial ecology and intergenerational legacy.
These experiences stem from decades of trial and error on production lines and cannot be obtained through reverse engineering. Australia's Lynas Company has operated its Malaysian factory for 15 years, and the purity of heavy rare earths is still stuck at 99.95%, far lower than China's 99.9999%.
What is even more fatal is that China's new regulations in October 2025 have completely blocked the path of technology outflow: from flotation reagents, roasting kilns, extraction tanks, to permanent magnet sintering furnaces, hydrogen crushing furnaces, key equipment and accessories in the entire industrial chain are prohibited from exporting. Even if foreign countries obtain ore, they are unable to move forward due to lack of equipment and technology.
[From theory to the Great Wall of Industry: Xu Guangxian laid the foundation, and thousands of craftsmen built a rare earth moat]
From the moment Academician Xu Guangxian deduced the "cascade extraction theory" in a humble laboratory in the early 1970s, the seeds of China's rare earth industry have been planted.
But theory is only a blueprint. It was the tens of thousands of unknown engineers, technicians, operators and scientific researchers in the next half century that really forged it into an unshakable technical barrier around the world.
They decommissioned the extraction tank in the wind sand, optimized the local mining process in the mountains of Zhejiang, recorded data day after day on the production lines of the steel, northern rare earth and Xiamen mill industry, adjusted parameters, and dealt with sudden failures.
It is these first-line workers who transform the purity goal of "99.9999%", from paper formula to a stable mass production industrial reality; it is in the acid smog-filled workshops that they grasp the path of wastewater recycling, so that high pollution of rare earth metallurgy goes to green;
It is also that they have accumulated "only imaginable" tricks - such as how to fine-tune the acid ratio when a mineral changes in the water content in the rainy season, or when a centrifugal bearing temperature rises, indicating which level of separation efficiency decreases.
Xu Guangxian lit the lighthouse, and Qian Qian ordinary skilled workers paved the whole road to the lighthouse with sweat and wisdom. This industrial civilization, which was jointly forged by national will, scientific foresight and grass-roots practice, can't be copied by a few drawings and experts.
It is deeply planted in China’s complete manufacturing soil and grows in the continuous iteration of engineering ecology – which is the foundation of China’s truly unshakable rare earth.
The ultimate truth of the rare earth game is that what China has built in half a century is not an industry, but a set of "chemical engineering civilization"-it combines Basic scientific research, engineering practice, environmental governance and industrial collaboration.
If the West wants to rebuild, it needs not money or mineral deposits, but an industrial ecology that can tolerate "dirty, bitter, and slowness" and the accumulation of generations of engineers. In the foreseeable future, this system-level advantage will remain the sharpest strategic trump card in China's hands.
[There is no shortage of rare earth minerals in the world, and industrial civilization cannot be achieved quickly]
The world's rare earth does not lack mines, but China's accumulated "pure hegemony" for 50 years. industrial civilization cannot be achieved quickly, so China controls the accurate strike: not the ban of mines, but the "technical chain".
The rare earth export controls introduced by China on October 9, 2025 do not simply restrict mineral exports, but directly hit the lifeline of the global supply chain:
From mining equipment, separation technology, extraction solvents, to the final magnetic material manufacturing process, the entire chain is covered and all are included in licensing management;
All overseas products that use China technology and equipment or contain more than 0.1% of China rare earth components require China's approval for re-export, implementing global extraterritorial long-arm jurisdiction for the first time;
It also clearly lists the rare earth materials that chips below 14 nanometers and memory chips above 256 layers rely on as the focus of control, and accurately counters the high-end fields that the United States intends to "choke the neck" of China.
Because of its irreplaceable technological advantages, this strategy accurately replicates the "technological traceability" logic of the United States to China, but it is more lethal-because almost all the world's medium and heavy rare earth refining capacity is in China, and the F-35, Core products such as THAAD missiles and Tesla cannot be bypassed.
【 Technical sovereignty is the real strategic shield of the city.】
After 2010, it took the United States 10 years to struggle to restart California's only rare earth mine, the "Yamaguchi Mine", which had been suspended for many years. However, the entire West only has partial smelting capabilities, and 80% of the light rare earths still need to be shipped to China for processing. Establishing medium and heavy rare earth refining capabilities is far away.
In a word, without China's "purifying hand", global rare earths are just "sleeping stones". What is valuable is not rare earths, but rare earth purification technology. Technological sovereignty is the real strategic moat.
Pakistan's export of rare earth raw materials to the United States is just a helpless move by resource countries under economic difficulties, which has neither technical content nor strategic significance.
With 50 years of sedimentary purification technology, the closure of the entire industrial chain and the scale effect, China has lifted rare earth from "resources" to "rules".
The essence of this game is not who has the mine, but who has the key to turning the mine into "industrial vitamins".In the foreseeable future, as long as China keeps technological barriers, the Western so-called "de-Chinese" rare-earth supply chain will eventually be airborne.