It is official that Chengdu (city in China) and Kathmandu are sister cities. Memorandum of understanding was signed by Rudra Singh Tamang, chief and executive officer of the Kathmandu Metropolitan City, and Tang Liangzhi, secretary of Communist Party of China and former mayor of Chengdu, on Friday. Various cultural program were held to mark this celebration in Patan Durbar Square. Watch the video below. Click here for More news at Kantipur.