U.S. warship USS Lassen illegally entered waters near Zhubi Reef, part of China’s Nansha Islands in the South China Sea, on October 27, 2015. China has monitored, tracked and issued warnings to the U.S. warship.

The U.S. move was long planned. U.S. media said in May that the U.S. navy wanted to “challenge” China’s construction projects in the South China Sea, and since September the U.S. navy has been laboring its views on South China Sea disputes and claiming to send a warship within 12 nautical miles of China's islands. The U.S. has long caused trouble in South China Sea disputes even though it is not one of the parties concerned to the South China Sea issue.

There is no doubt that the U.S. made such a move for strategic reasons: first, it deliberately created tensions in the South China Sea so as to impede China’s safeguarding of its legal rights in the area; second, the move contributes to the implementation of U.S. regional strategy of "Asia-Pacific Rebalance"; third, the U.S. can take the chance to cozy up to its allies.

The U.S. claimed “freedom of navigation” for other purposes . It is the U.S. actions that have worsened tensions in the South China Sea.

China has responded to U.S. warship provocation with a clear-cut stand. What China does is legitimate. China’s sovereignty in the South China Sea has historical and legal grounding. Its construction, salvage and disaster prevention in this area demonstrate it is a responsible country.

China is determined to defend its sovereignty and safety and has taken actions to cope with the move of the U.S. warship which has threatened China's sovereignty and safety. China warned the U.S. not go further, otherwise China will take all necessary measures. China hopes the U.S. will keep a clear mind. Troublemakers are bound to be condemned.

China also reminds the U.S. to consider the bigger picture in terms of Sino-U.S. relations. The two countries are working together to build a new type of major-country relations, and so they should focus on advancing this win-win cooperation. China never fears troubles, but the U.S. should never create troubles. If the U.S. plays with fire in South China Sea, the consequences will be very serious. 

The article is edited and translated from《美国务须保持头脑清醒（望海楼）》, source: People's Daily Overseas Edition, author: Su Xiaohui, deputy director of the Department for International and Strategic Studies at China Institute of International Studies.