Yin Shiliang's sons collect honey on a tree in Mengla County, southwest China's Yunnan Province, April 19, 2009[Li Yunsheng/Xinhua]
![Yin Shiliang's sons collect honey on a tree in Mengla County, southwest China's Yunnan Province, April 19, 2009[Li Yunsheng/Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090421/000bcdb95f1d0b57707026.jpg "Yin Shiliang's sons collect honey on a tree in Mengla County, southwest China's Yunnan Province, April 19, 2009[Li Yunsheng/Xinhua]")