Because China and Cambodia have a long history of establishing diplomatic relations, Cambodia and China have maintained close relations since the establishment of diplomatic relations with China in 1958. The current Cambodian Prime Minister Hun Sen’s ancestral home is Chaozhou, and his wife is also a descendant of Hainanese. It can be said that the relationship with China is very close.

Sihanouk passed the throne of Cambodia to his son Norodom Sihamoni in 2004. He had stayed in China for a long time in the past and had deep feelings for China. Sihanouk came to China this time mainly for medical treatment. However, due to his old age (90 years old), weak body and other reasons, the treatment failed and he died in Beijing. For this reason, the flag was flown at half-mast in Beijing's Tiananmen Square in mourning. Therefore, Sihamoni is very grateful to the Chinese government.

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China’s One Belt, One Road policy has also injected new vitality into Cambodia. A country that was originally poor and backward suddenly achieved a qualitative leap. Cambodia has also become the core area of ??the Belt and Road Initiative. High-rise buildings are rising one after another, and many Chinese factories have moved to Cambodia, providing employment opportunities for local people and improving their living standards.

China is Cambodia’s largest source of foreign investment. Chinese enterprises have achieved positive results in investment cooperation in infrastructure construction, electric power, agriculture, tourism development, special economic zones, information and communications and other fields, making important contributions to Cambodia’s economic and social development. contribute. Chinese companies have built the longest roads and bridges, built the largest number of power stations, and laid the longest optical cables in Cambodia. Infrastructure construction has strongly promoted domestic interconnection in Cambodia, and combined with the construction of parks represented by the Sihanoukville Special Economic Zone, China's successful development experience has been introduced into Cambodia and taken root.