A worker at China's Henan Provincial Centre for Conservation checking the condition of an ancient bamboo coloured mat which is part of a project that will see four mats restored to what they looked like more than 2,300 years ago. The woven mats were found two years ago in a tomb in the province's Xinyang city. Two of the four recovered were the largest-ever unearthed from tombs of the Chu state during China's Warring States period (475 to 221 BC), each measuring about 2.5m long and 1.8m wide. After restoration, the mats would probably go on display at the beginning of next year.