Interestingly, the Chinese copyright database jumps directly from 970498 (Zhan Guo Qun Xiong Zhuan) to 970500 ("Mathematical Genius" - something to do with Sachen's Magic Mathematics, possibly?), skipping 970499 entirely.
The two surrounding games? They're both copyrighted by Waixing, of course, so that'd suggest 970499 was also Waixing.