“I went to Nanjing a week ago."He said.这句话怎么改成被动句啊?

问题描述:

“I went to Nanjing a week ago."He said.这句话怎么改成被动句啊?
说错了说错了,怎么改成间接引语啊?

I was told that he went to Nanjing a week ago.