Jiangxinpo

Jiangxinpo was an area currently in Kachin State, Myanmar, located between the N'Mai and Mali Rivers, west of the Gaoligong Mountains of Yunnan, China. It was previously under the rule of the Qing dynasty of China.
In 1910, a year before the Republic of China was established, the British occupied Hpimaw in the Pianma Incident, as well as a part of what is now Northern Kachin state in 1926-27 and part of the Wa states in 1940.
It was disputed territory between China and Myanmar until 1961, when the People's Republic of China recognized Myanmar's sovereignty over it, with the exception of Burma relinquishing small amount of that territory, namely Hpimaw and adjacent Gawlam and Kangfang to the PRC, as part of Lushui county. Some Chinese commentators, especially those on ROC's media, as well as those overseas,criticised the PRC government for signing the agreement, which they regarded as guaranteeing the permanent loss of former Chinese territory to Myanmar.