The Yarlung Zangbo and Bangong-Nujiang belts were twins in the Tethyan Ocean,which began to develop into two ocean rift belts in the Triassic.

• 雅鲁藏布江和班公湖-怒江带是特提斯洋中的孪生姊妹,它们均是从三叠纪起就发展成大洋裂谷带的;