BEIJING: China launched its first domestically built aircraft carrier on Wednesday amid rising tension over North Korea and worries about Beijing’s assertiveness in the South China Sea. State media has quoted military experts as saying the carrier, China’s second and built in the northeastern port of Dalian, is not expected to enter service until 2020, once it has been kitted out and armed. Foreign military analysts and Chinese media have for months published satellite images, photographs and news stories about the second carrier’s development. China confirmed its existence in late 2015. The launch “shows our country’s indigenous aircraft carrier design and construction has achieved major step-by-step results”, Xinhua news agency said. State television showed the carrier, its deck lined in red flags, being pushed by tug boats into its berth. Fan Changlong, a vice chairman of China’s powerful Central Military Commission, presided over the ceremony, Xinhua said, during which a bottle of champagne was broken on the bow. The launch follows China’s celebration on Sunday of the 68th birthday of the founding of the Chinese navy, and comes amid renewed tensions between North Korea and the United States over Pyongyang’s nuclear and missile programmes. Little is known about China’s aircraft carrier programme, which is a state secret.