I believe KHC uses HZ-WBT3 - the pictured 747-400, a 1992 model flying previously for Air China - as well as HZ-WBT6, an ex-Gulf Air 767-300ER, built in 1993.
A Hawker 800
HZ-WBT5 is used as well.
767 pictures
The A340 seen here(sold to?)
This 727 is wearing the KHC colors, any link with KHC today still?