On this day, 185 years ago, May 26, 1840 (April 25, 1840, the lunar calendar), Lin Zexu opposed closing the country. On May 26, 1840, Lin Zexu refuted the proposal to close the customs and ban the sea. After Lin Zexu was ordered to cut off Sino-British trade in early January 1840, on January 15, Dali Temple Minister Zeng Wangyan said: The British repeatedly requested to seal the customs and sea, and try to suppress them to clear up the source of the abuse. Emperor Daoguang asked Lin Zexu and others to "carefully discuss and submit a report." On May 26, Lin Zexu, Guangdong Governor Yiliang, Navy Admiral Guan Tianpei and others refuted Zeng Wangqing's claims. He believed that to deal with the British invaders, we must "control well, be prepared without hesitation" and pay attention to fighting strategies. Closing customs and banning the sea can only drive out fish from the depths. Not only will it not end opium smuggling, it will also make Western countries "unite and collude for private purposes," which is extremely unfavorable to China's fight against smoking and Britain. He advocated taking advantage of the contradictions among Western capitalist countries to ban illegal smuggling, protect legitimate trade, win for the majority, and isolate and crack down on the main enemy, the British invaders. Lin Zexu opposed a return to the Qing Dynasty's original path of closing the world and isolating the country, which was very insightful at that time.