a trade mission to China的用法和样例：
- He leads a trade mission to China .
- He leads a trade mission to china.
- He is the leader of a trade mission to Japan.
- Canada's premiers are now considering a trade mission of their own to China, as if to fill a gap, but our companies need to have confidence in Ottawa's approach, too.
- The trade minister with a trade mission pay a visit to that country.