In October 2008, Japanese Prime Minister Aso Taro visited Beijing to celebrate the 30th anniversary of the conclusion of the Treaty of Peace and Friendship between Japan and the People's Republic of China. At the reception, he remarked on his "personal conviction regarding Japan-China relations": "We should not constrain ourselves in the name of friendship between Japan and China. Rather, sound competition and active cooperation will constitute a true "mutually beneficial relationship based on common strategic interests." Confucius said, "At thirty, I stood firm." In the same way, Japan and China must now stand atop the international stage and work to spread to the rest of the world this spirit of benefiting together". Although Japanese and Chinese policymakers claimed that "ice-breaking" and "ice-melting" occurred in the bilateral relationship between 2006 and 2010, however, none of the fundamental problems related to history and disputed territory had been resolved, and so there was a virtual "ice-berg" under the surface. A public opinion poll of the entire population of China conducted by Pew in spring 2008 shows:  In 2010, China overtook Japan as the world's second-largest economy. In 2012, China’s gross GDP was 1.4 times as big as Japan’s. In the next three to five years, the Chinese economy is on track to grow to twice the size of Japan’s. As a matter of fact, Japan was quite reluctant to witness China’s incredible economic growth and therefore had increased its vigilance towards China by viewing China as its biggest threat under Prime Minister Abe’s leadership currently. Chinese animosity or even hatred of Japan is reflected in the popular culture. American reporter Howard French states in 2017:   On September 7, 2010, after a Chinese fishing trawler collided with two Japanese Coast Guard patrol boats near the disputed Senkaku Islands, the captain of the trawler, Zhan Qixiong, was arrested by Japanese sailors, sparking tensions. The Japanese government took this action by China as a de facto trade embargo and decided to set aside 53.3 billion yen for the following measures to reduce dependence on Chinese mineral resources:  In 2011, Chinese foreign ministry spokesman Ma Zhaoxu criticized the annual Japanese defense white paper for calling attention to the "China threat theory". Both China and Japan claim sovereignty over East China Sea islets that Japan calls the Senkaku Islands and China calls the Diaoyu Islands. Tensions have risen since September 2012, when the Japanese government purchased three of the islets from a private Japanese owner, leading to widespread anti-Japan demonstrations in China.