Liu Guangyuan (L), Chinese Ambassador to Kenya, and the head of the International Committee of Red Cross regional delegation in Nairobi, Christopher Luedi, sign hostage handover documents at Wilson Airport, in Nairobi, Kenya, Feb. 7, 2012. Chinese Foreign Ministry confirmed Tuesday evening that the 29 Chinese workers kidnapped last month by Sudanese anti-government forces have been released and arrived in Nairobi safe and sound. [Xinhua]