You may also encounter FZHTJW--GB1-0 (方正黑体简体), which is the standard "Black" weight. The "DH" in your specific query ( FZDHTJW ) stands for , the extra-bold version of that standard family . 方正黑体简体.TTF - GitHub
The identifier FZDHTJW--GB1-0 refers to a specific typeface from the FounderType fzdhtjw--gb1-0 font
: Often used as a standard font for specific government or formal document headings. You may also encounter FZHTJW--GB1-0 (方正黑体简体)