China and Japan need emergency hotline to avoid risk of accidental war, warns US Mr Biden will land in Beijing on Wednesday, where he promised to reiterate Washington's position, already made clear last week by the decision to fly two B-52 bombers through the Chinese zone, deliberately ignoring Chinese demands for flights to identify themselves. "I will be raising these concerns, in great specificity, directly when I meet with the Chinese leadership," Mr Biden added. The Chinese decision to announce its identification zone - which crosses an established Japanese zone and covers the disputed Senkaku islands, which the Chinese call the Diaoyu - has infuriated both the US and China's neighbours in the East and South China Seas. Washington does not take a position in relation the islands' sovereignty, but it does recognise Tokyo's administrative control, which means it would stand by treaty obligations to help defend the islands from attack, although seeking to avoid such an escalation. Tensions in the region have ratcheted up, causing South Korea to announce it was preparing an air defence identification zone of its own, in response to China. Meanwhile on Monday, China's ambassador to the Philippines said Beijing had the right to declare a similar aviation defence zone over the South China Sea - putting it in potential conflict with claims by Brunei, Malaysia, the Philippines, Taiwan and Vietnam. Mr Biden will arrive in the South Korean capital, Seoul, on Thursday as officials put the finishing touches to plans for its expanded zone that includes a clutch of southern islands and an ocean research station built on an underwater reef, according to South Korea's Yonhap news agency.