Thangka, a gem of Tibetan culture, is a Buddhist painting. The art form has been preserved for over 2,000 years. Known as "recorded message" in Tibetan language, the paint is meant to last. Although the sacred art form has evolved over the years, Tibetan Thangka artists strive to adhere to the traditional guidelines. CGTN reporter Yang Xinmeng and Spanish vlogger Noel received their first Thangka painting lesson in Lhasa and explored the secret behind the cultural heritage.