Update on 15 July:

Effective July 15, 2024, the 144-hour visa-free transit policy will be implemented at the airport in Zhengzhou in Henan Province. The permitted stay area for foreign nationals entering China through this airport is the administrative region of Henan Province. Eight additional permitted stay areas (including cities and autonomous prefectures) for foreign nationals entering Yunnan Province under the144-hour visa-free transit policy are also designated in addition to Kunming, namely Lijiang, Yuxi, Puer, Chuxiong, Dali, Xishuangbanna, Honghe and Wenshan. This time, three exit-entry ports, namely Zhengzhou Xinzheng International Airport in Henan Province, and Lijiang Sanyi International Airport and the exit-entry port of Mohan Railway Station in Yunnan Province, are designated to implement the 144-hour visa-free transit policy.

Original article on 8 July 2024:

The Chinese Government Website and the State Council App, in collaboration with the National Immigration Administration, have produced an "at-a-glance" guide to Visa-Free Transit Policies for Foreign Nationals.

Source: https://mp.weixin.qq.com/s/dzz7uMggkFybd2REleLg3Q