回複：求助:人在法國,上月完成加拿大移民體檢,今天得到US J1 offer

If you have Jw109 form (you should have this form when you applied for passport to go France), just go ahead. Besides getting Non-objection letter from Chinese Embassy,there are four ways to get waiver, depending on your personal situation. For detail, please review Department of State's website.

Good luck!