First they came to build a lighthouse. Nothing happened. Emboldened, they then returned to the Diaoyu islands to set up a monument to World War II dead with a Japanese flag painted on it. It is time to tell the Japanese enough is enough. Diaoyu islands have been Chinese territory since 1534. No aggression can alter this reality. Humiliated by intensified provocation, Beijing last week reacted with a barrage of commentaries through major newspapers and Xinhua (New China News Agency), condemning Tokyo's sovereignty claims and reviving militarism. Condemnations are inadequate. Beijing should dispatch navy boats to dismantle the lighthouse and Japanese flag on the islands to reassert sovereignty. Japanese resurging militarism must be nipped in the bud. Yesterday, mainland victims of Japan's brutal occupation during World War II and other activists petitioned President Jiang Zemin and military leaders to remove markers right-wing Japanese groups erected on the islands. Traces of Japan's growing militarism are not difficult to detect. With the economy rising from the troughs, the Japanese Government has grown more confident in pursuing its ambition to become a major political and military power. Its latest defence budget is the second largest in the world. Politicians went to pay tribute to the war dead and criminals at the Yasukuni shrine on August 15, as the rest of Asia marked the 51st anniversary of the end of World War II. The right-wing Prime Minister Ryutaro Hashimoto visited the shrine on July 29, his birthday. Not only were people on the mainland and in Taiwan outraged by Japan's provocation, Hong Kong people were also furious. They protested strongly last week against Japanese Foreign Minister Yukihiko Ikeda's reassertion of Tokyo's sovereignty claims. About a dozen people, headed by legislator Tsang Kin-shing, have joined a group which plans to set off for the Diaoyu islands in early October to tear down the lighthouse. Perhaps shipping tycoon Tung Chee-hwa, a front runner for the chief executive's job in the Special Administrative Region, would consider lending a ship to the group. That may boost his chances since a display of patriotism would definitely win him a lot of political points. And it would not be a bad idea for the Chinese navy to escort the group to the islands if Beijing reckons sending troops there would be too politically sensitive.