回複：我怎麽樣才能豁免？？？謝謝你的回答

If through the usual no objection route.
1. online DS-3035 to get your case number and pay fees.
2. have no objection letter sent from China embassy to DOS.
3. DOS will send the favorable recommendation to you and to USCIS(if requested)
4. USCIS issues you approval notice.