Aerial photo taken on Sept. 28, 2020 shows workers working at a soy sauce factory in Daqiao Township of Hejiang County, southwest China's Sichuan Province. The traditional soy sauce-making featuring sun-drying and fermentation has a history of over 100 years in Hejiang. It has been listed as a provincial intangible cultural heritage of Sichuan. (Xinhua/Jiang Hongjing)