回複：No objection letter 是中國領館出的

continue to contact by phone or Fax (mark your case number). Make sure the No objection letter have mailed to the USA State Council. Sounds weird! Generally, after the No objection letter sent out for six months, you have right to contact the State Coucil. I know the phone is very difficult to get through. try the early morning around 9:00 (East time). Make sure your no objection letter have arrived at the State Council for six months (otherwise, it will be delayed a lot)
good luck