You could have downloaded PMDG 747-400F GE China Airlines Cargo 1.20 from our software library for free. This free software is a product of Precision Manuals Development Group. The following versions: 1.2 and 1.0 were the most frequently downloaded ones by the program users. The program is included in Education Tools.
From the developer:
With the rapid expansion of the world's cargo carriers, the -400F will allow you to recreate the dynamic world of flying freight. Fly to exotic destinations with a highly detailed representation of this versatile freighter, complete with its prominent opening nose.
747-400F CARGO is an expansion product that adds new visual models and updated systems to reflect those of the real -400F airplane.
You may want to check out more software, such as PMDG BAe JS4100, Cargo Data KoldLink or PMDG 747-400/400F for FSX, which might be related to PMDG 747-400F GE China Airlines Cargo.