RUKUM, June 3, 2016 (Xinhua) -- A Nepalese woman carrying her child searches for yarsagumba at the Pupal valley of Rukum district, Nepal, May 28, 2016. Thousands of people gathered at the Pupal valley, some 4,500 meters above the sea level, from May to June to pick up yarsagumba, or caterpillar fungus, which is highly valued in the global market. (Xinhua/Pratap Thapa)