Extraction code: iy8s? The Roof of the World is a documentary directed by Hairuo Zeng, which was broadcast on CCTV Chinese International Channel on March 25th, 20 15. Planned and produced by the State Council Press Office, and jointly produced by cctv-4 and Beijing Wuxing Legend Culture Media Co., Ltd., it is the first work of the Tibet trilogy. It is the first Tibet-related TV documentary in China that comprehensively reflects the harmonious coexistence between man and nature on the Qinghai-Tibet Plateau, and it is also the first high-definition documentary produced by 4K technology in China.