I got to know that they were college students travel in China.把travel改成头travel不可以吗

应该是把travel改为travelling(现在分词作定语,修饰college students,------正在中国旅行的大学生
不可以把travel改为to travel 因为不定式作定语表示将来意义那做这种题的时候就是根据语境分析呗 是吗对，要根据上下文的意思来确定如:They are the workers to help usrepair the car tomorrow