Students wave China's national flags and flags of Hong Kong Special Administrative Region to welcome China's space-tracking ship "Yuanwang VI" in Hong Kong, south China, on April 29, 2009. "Yuanwang VI" arrived in Hong Kong on Wednesday for a six-day visit, kicking off a string of activities in the special administrative region to celebrate the 60th anniversary of the founding of the People's Republic of China, which falls on Oct. 1.