"Yao Dian, a herbalist in the Ministry of Rites of the Tang Dynasty, was ordered by the Xuande Palace to welcome the Tibetan emissaries and the leaders of the five tribes in the southwest." Yao Dian greeted him with a smile, but his face was full of smiles. The Tubo minister Lu Dongzan led the five tribes in the southwest to meet the Celestial Lord. Lu Dongzan also performed a Tubo courtesy...