Hardtalk's Zeinab Badawi talks to one of China's most senior diplomats, ambassador Wu Jianmin. China has been accused by Washington of bullying its neighbours in the South China Sea over disputed territory, and Washington is seeking a new trade pact in Asia that excludes Beijing. Meanwhile China is spending hundreds of billions in investment projects across Europe, Asia, Africa and Latin America, extending its economic power the world over. Is China the world's new superpower?