Exhibitors display toys made by wheat straw at an expo in Hefei, capital of east China's Anhui Province, June 17, 2019. Farmers are busy with recycling wheat straw as the harvest season has come. The recycled straw can be made into handicrafts. (Xinhua/Chen Bin)

　　A farmer collects wheat straw with agricultural machinery in the field of Lijiakou Village in Yongqing County, north China's Hebei Province, June 17, 2019. Farmers are busy with recycling wheat straw as the harvest season has come. The recycled straw can be made into handicrafts. (Xinhua/Lu Feng)

　　Aerial photo taken on June 17, 2019 shows farmers collecting wheat straw with agricultural machinery in the field of Cheng'anpu Village in Xinle City, north China's Hebei Province. Farmers are busy with recycling wheat straw as the harvest season has come. The recycled straw can be made into handicrafts. (Xinhua/Jia Minjie)

　　A child views art works made by wheat straw at an expo in Hefei, capital of east China's Anhui Province, June 17, 2019. Farmers are busy with recycling wheat straw as the harvest season has come. The recycled straw can be made into handicrafts. (Xinhua/Chen Bin)

　　Farmers collect wheat straw with agricultural machinery in the field of Lijiakou Village in Yongqing County, north China's Hebei Province, June 17, 2019. Farmers are busy with recycling wheat straw as the harvest season has come. The recycled straw can be made into handicrafts. (Xinhua/Lu Feng)

　　A farmer collects wheat straw with agricultural machinery in the field of Cheng'anpu Village in Xinle City, north China's Hebei Province, June 17, 2019. Farmers are busy with recycling wheat straw as the harvest season has come. The recycled straw can be made into handicrafts. (Xinhua/Jia Minjie)

　　A visitor takes photos of cartoon animals made by wheat straw at an expo in Hefei, capital of east China's Anhui Province, June 17, 2019. Farmers are busy with recycling wheat straw as the harvest season has come. The recycled straw can be made into handicrafts. (Xinhua/Chen Bin)