What happened: China rejected India’s “standard names” on the Arunachal Pradesh map

China rejected India’s formal identification of 27 places and features in Arunachal Pradesh under “standard names” on an official Indian map. China’s foreign ministry spokesperson described the naming step as illegal and void.

China also said China does not recognize Arunachal Pradesh as set up by India. Beijing reiterated that the region called Zangnan belongs to China and argued that India’s attempt to replace long-used Chinese names would not change China’s position.

Background: China’s periodic release of Chinese place names since 2017

What changed now: India’s standard naming versus China’s rejection and counter-naming

The immediate change is India’s formal step of identifying 27 Arunachal Pradesh places and features under “standard names” on an official map. China’s counter-position is a public rejection on legality and recognition grounds, along with renewed insistence on Chinese place-names, including the regional name Zangnan.