upon democracy or human rights. In February 2009, Hu visited Saudi Arabia a second time, to "exchange views on international and regional issues of common concern" with King Abdullah. During this visit, Hu commemorated the opening of a cement plant in Saudi Arabia and worked to strengthen bilateral ties. In February 2019, the Saudi Crown Prince, Muhammad bin Salman, made a visit to China where he met the Chinese leader and a number of high officials. Along with the paramount leader, the crown prince met the Chinese premier, Minister of Foreign Affairs and others where they agreed in boosting the already-strong commercial ties between the two parties. As both the parties have their own long-run strategic plan, China's Belt and Road and Saudi's Vision 2030, they both expressed wellings to collaborate in the implementation of the said strategies. Moreover, the two parties signed a cooperation agreement to enhance researches and studies in the maritime transport industry. The Saudi crown prince agreed to allocate $10 billion to establish a refining and petrochemical complex in China. In the sideline of the visit, the Saudi Crown Prince announced Saudi Arabia's willingness to teach the Chinese language in the Saudi's schools and universities. In December 2022, the General Secretary of the Chinese Communist Party, Xi Jinping, made a visit to Saudi Arabia where he met King Salman of Saudi Arabia and Crown Prince Mohammed bin Salman. Human rights In July 2019, UN ambassadors of 37 countries, including Saudi Arabia, have signed a joint letter to the UNHRC defending China's treatment of Uyghurs and other Muslim minority groups in the Xinjiang region. In June 2020, Saudi Arabia was one of 53 countries that backed the Hong Kong national security law at the United Nations. Trade and investment China-Saudi trade has increased significantly since 2000. In 2005 alone, trade increased 59%, allowing Saudi Arabia to overtake Angola as China's largest source of oil for the first time. After claiming the throne in 2005, King Abdullah adopted a pro-Asian, "look east" trade policy, with more than half of Saudi oil going to Asia. Saudi-owned Saudi Basic Industries Corporation (SABIC) alone exports over $2 billion in petrochemicals to China on a yearly basis. In 2008, China-Saudi bilateral trade was worth €32,500,000,000, making Saudi Arabia China's largest trading partner in Western Asia. In the first quarter of 2010, Saudi oil export to China has reached over 1 million barrels,