The 757-200 aircraft, Registration B-2835, is the 12th 757-200 freighter conversion completed by HAECO Xiamen since the programme commenced in March 2010.
It is also HAECO Group's 129th passenger-to-freighter aircraft, HAECO Xiamen said in a statement.
"The Boeing 757-200 converted freighter is a new aircraft type for our growing express freight network in Asia," said Mr Yang JianGuo, General Manager of China Postal Airlines.
The airline will put all seven 757 PCF aircraft into operation in 2017.
China Aviation Daily