Chinese singer, film and TV star Chen Kun (L) claps for the children who piece together the puzzle of the UNICEF's new official website in China before its launch at the appointment ceremony in Beijing, capital of China, April 5, 2012. Chen Kun was appointed UNICEF Ambassador for China on Thursday. In his new role, Chen will help UNICEF urge for the protection of children's rights. [Photo: Zhang Rui / China.org.cn]