BEIJING, March 13 (Xinhua) -- Chinese Premier Li Keqiang and British Prime Minister Theresa May exchanged congratulatory messages Monday on the 45th anniversary of the establishment of diplomatic relations at the ambassadorial level between China and Britain.

Over the past 45 years, mutual integration of interests between China and Britain has kept deepening, with plenty of achievements made in mutually beneficial cooperation, while people-to-people and cultural contacts between the two countries have become increasingly closer, practically in the interest of the two peoples, Li said in his congratulatory message.

Currently, China-Britain relations stand at a new starting point and have a solid foundation for cooperation and a broad space for growth, Li said.

China is willing to make joint efforts together with Britain to further consolidate mutual trust, pursue new achievements in bilateral pragmatic cooperation, and push bilateral ties to advance further and steadily on the track of mutual trust, mutual complementation and mutual benefit, in the greater interest of the two peoples, he said.

Theresa May expressed good wishes to the Chinese government and people in her congratulatory message.

The Britain-China partnership is in sustained development, with frequent high-level exchanges and contact, with fruitful high-level dialogue, with increasingly closer trade and investment links, and with people-to-people and cultural exchange keeping deepening, which has greatly promoted the well-being of the two countries, she said.

The British prime minister expressed the belief that Britain-China cooperation will surely score more achievements in future.