China's Defense Ministry has denied reports that the country is building a second aircraft carrier in Shanghai and it will be launched later this year. Defense Ministry spokesman Yang Yujun says such foreign media reports are "inaccurate." China's first aircraft carrier entered service earlier this week. The carrier, rebuilt from the Soviet ship Varyag, was renamed "Liaoning" and underwent years of refitting and sea trials. China is urging Japan to cease immediately all actions that infringe China's territorial integrity and sovereignty. The move comes following Japanese Prime Minister Yoshihiko Noda's remarks at the UN General Assembly on Wednesday when he claimed that the Diaoyu Islands "are an integral part" of Japan's territory. The Chinese Foreign Ministry says "China is strongly disappointed and sternly opposes the Japanese leader's obstinacy regarding his wrong position on the Diaoyu Islands issue." China has repeatedly stated that the country has sufficient historical evidence and legal basis to prove the Diaoyu Islands have been an inseparable part of Chinese territory since ancient times.