这句话中介词短语担任什么成分?my father went to Guangzhou on business 中on business 是状语还是 Guangzhou的补语?怎么确定?

问题描述:

这句话中介词短语担任什么成分?
my father went to Guangzhou on business 中on business 是状语还是 Guangzhou的补语?怎么确定?

状语,去做生意