Ma Suying (1st, L) expounds the techniques of embroidery of Yi ethnic group to enthusiasts at an experience center in east China's Shanghai, August 4, 2019. Together with volunteers from Shanghai, Ma Suying, a teacher of Yi ethnic group from Yuanyang county of southwest China's Yunnan province, started a workshop providing embroidery training for local women and helped them increase their income through the sale of embroideries. [Photo/Xinhua]