evidence: After the founding of New China, Hong Kong, Macau and other places were recovered through diplomacy and other means, but there were still some important territories that could not be recovered, including the three strategic locations of Sakhalin, Vladivostok and Jiangxinpo. So, is it possible to reclaim these territories in the future? First, let's take a look at Sakhalin Island. [...] During the Ming and Qing Dynasties, China, Myanmar and other countries had ongoing disputes over the border line near Jiangxinpo, where many countries and ethnic groups also lived. When the British invaded and occupied the Jiangxinpo area, China had been in a very passive situation. After the founding of the People's Republic of China, territorial negotiations were conducted with Myanmar and other countries. Due to the British occupation and long-term control of Chinese territory during the colonial period, most of the people living there were Burmese and Indians. Faced with this situation, China can only abandon Jiangxinpo in exchange for the recovery of territory in other areas. This is a choice and a helplessness.