An artist from Chengdu, capital of Southwest China's Sichuan province, performs during a cultural exchange program at Patan Durbar Square in Lalitpur, Nepal, Dec 23, 2016. The program was organized to highlight the cultural attractions of Chengdu and to share those features with Nepali people. Kathmandu formally established sister-city relationship with Chengdu on Friday. [Photo/Xinhua]