Egyptian President Abdel Fattah el-Sisi said Egypt hopes to push mutually beneficial cooperation with China and bring more benefits for the peoples of both countries.
Hainan has established sister relationships with 56 overseas provinces and cities worldwide, including Hawaii in the United States, South Korea's Jeju special autonomous province, Canada's Prince Edward Island, Finland's Oulu province and the state of Penang in Malaysia.
Unit 731 was a top-secret biological and chemical warfare research base established in Harbin in 1935 as the nerve center of Japanese biological warfare in China and Southeast Asia during World War II.
Kuwait's Emir Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah said his country would like to strengthen its traditional friendship with China, and he hopes for greater development in the Kuwait-China friendship.
Liu also pledged more measures to boost cross-Straits economic and cultural cooperation and improve the wellbeing of people on both sides.
The People's Republic of China adopted its first Constitution in 1954. The current Constitution was adopted in 1982 and then amended in 1988, 1993, 1999 and 2004.
The experts have taken pictures of the documents found and brought them to China. In the next step, they will do translations and further research, according to Liu.
From a less-developed island, the province has become an international tourism destination that attracted 67.45 million tourists last year, seven times its population.