Which cities in Guangdong Province have opened direct flights to Taiwan Province Province (direct flights)?

If you mean direct flights to Taiwan Province Province, only Guangzhou Baiyun International Airport and Shenzhen Baoan International Airport have direct flights.

If you ask about the cities that have opened free travel, only four cities in Guangdong have opened free travel in Taiwan Province Province: Guangzhou (20 1 1), Shenzhen (20 12), Zhongshan (20 14) and Huizhou (20 15). Anyone who has a household registration or residence permit in more than 8 cities in Guangdong Province can apply for a personal travel endorsement in Taiwan Province Province (Note G) and travel freely in the corresponding areas in Taiwan Province Province. There is no time limit for those who have a residence permit. Once they get it, they will be the same as registered residents. Residents from other parts of Guangdong can only take part in group tours to Taiwan Province Province.