Original sentence: Ironically, the Chinese troops fought the border conflicts with Vietnam in the mid-1980's were sent by the regime to suppress the democracy movement, and the patriotic songs sang by demonstrating students were dedicated to these same Chinese troops to suppress them instead of fighting Vietnam, while Vietnam was the first country in the world at the time to immediately voice its strong support of the crackdown
Edited sentence: Ironically, the Chinese troops fought the border conflicts with Vietnam in the mid-1980's were sent by the regime to suppress the democracy movement, and the patriotic songs sang by demonstrating students were dedicated to these same Chinese troops to suppress them instead of fighting Vietnam, while Vietnam was the first country in the world at the time to immediately voice its strong support of the bloody crackdown