Which city in China is Phnom Penh near?

Yunnan province, Hainan province. Cambodia borders China and is close to China's Yunnan and Hainan provinces. Cambodia, formerly known as Khmer, is located in the Indo-China Peninsula of Southeast Asia, with the capital of Phnom Penh. This country borders Thailand in the west and northwest. Phnom Penh is the capital of the Kingdom of Cambodia, the largest city in Cambodia, and the political, economic, cultural, transportation, trade and religious center of Cambodia. Phnom Penh covers an area of 678.46 square kilometers.