hi, is there any bus/train from Fenghuang to Chongqing?

There is no direct bus or train service. But you may take a bus to Tongren from Fenghuang General Passenger Transport Station. The buses are available from 7:30 to 16:30, and the fare is CNY 22. Upon arrival, take a train to CQ from Tongren Railway Station (about 7.5 hours). :)