103 years ago today, March 1, 1922 (February 3, 1922 in the lunar calendar), the Sha Tin tragedy was committed: the British army in Hong Kong suddenly attacked striking workers. Representatives of seafarers and workers took a group photo. The third from the right in the front row was Su Zhaozheng, one of the strike leaders. On March 1, 1922, workers in various industries such as post and telecommunications, banking, shipbuilding and other industries in Hong Kong jointly held a General Alliance strike, and the number of people increased to more than 100,000. This was the climax of the strike in Hong Kong since January. The strike struggle paralyzed all shipping in Hong Kong, disrupted traffic in the city, and halted production. On March 4, the striking workers walked back to Guangzhou. When they were passing through Shaguo Village, they were shot and attacked by British military police, killing 6 people and injuring hundreds more, creating the "Shatin Massacre" that shocked the country. The atrocities aroused the anger of workers and won the support of railway workers across the country such as Jingfeng and Jingsui and Shanghai seafarers. On March 8, the British Hong Kong authorities formally signed a contract and were forced to agree to increase wages by 15% to 30%, restore trade unions, release arrested people, and compensate each of the families of the victims of the Sha Tin massacre with 1000 yuan. The strike ended.