This thesis is about interstate cultural interactions along the Southwestern Silk Road regional sphere. My exploration incorporates two sections from the perspective of history and linguistics. Chapter 1 examines the historical sources regarding music performances sent from the Pyu kingdom in modern-day Myanmar to the Chinese Tang court around the end of the 8th century and the beginning of the 9th century. I argue that the religious interactions of this region along the Southwestern Silk Road are overshadowed by the political situation on the border between Tang China, Nanzhao and a kingdom in Burma. Chapter 2 investigates the selection between causative and non-causative verbs together with the suffixes within the context of The Glass Palace Chronicle. I consider the influence of Pali language so that we can see the selection of causative and non-causative verbs in Sino-Tibetan language interacts with an Indo-European language through the religious influence.