Below you can find the One of the world's longest rivers it forms the border between china's sichuan province & tibet Jeopardy Words Answer. The answer to One of the world's longest rivers it forms the border between china's sichuan province & tibet has 7 letters. This clue belongs to the Asian bodies of water category and is part of Jeopardy Word Level 2371. If you scroll near the bottom you will find other clues and answers part of level 2371