Original sentence: The PRC does not recognise the McMahon Line and claims that the area is a part of the Tibet Autonomous Region instead.This region was recognised by Tibet as belonging to British India under the McMahon Line Agreement (part of the 1914 Simla Convention)
Edited sentence: The PRC and ROC on Taiwan island does not recognize the McMahon Line and claims that the area is a part of the Tibet Autonomous Region instead.This region was recognised by Tibet as belonging to British India under the McMahon Line Agreement (part of the 1914 Simla Convention) which China never signed