What is the difference between Sufeng Doors and Windows Software and Changfeng Software? Which software can be upgraded? I was confused. What's going on with Jin Changfeng Software?

Jin Changfeng’s boss is a software developer, and he recruited Sun to manage the company’s operations. Then Sun wanted to eat up Changfeng, but the developer was unwilling, so he came with the code he wrote. Jinan established Jin Changfeng and later changed its name to Sufeng Software. Changfeng's current version is a modified version of the 03 Jianxin software. It has nothing of its own and has started selling hardware. The majority of netizens can take a look at Changfeng’s version from 2000 to 2015. Who is the author’s name at the end? There is no alternative to seizing the market at low prices, just like genuine and fake Nike. It's cheap but not good, it's just a one-time deal.