Here is everything you need to know about this specific font identifier.
The prefix stands for FangZheng (方正) , one of China’s most prominent type foundries. Based in Beijing, FangZheng is responsible for a vast library of Chinese typefaces used in publishing, digital screens, and operating systems. If you see "FZ" at the start of a font name, it is almost certainly a FangZheng product. fzltzhk--gbk1-0 font