Currently available firmware features:
1. Chinese menu
2. S table
3. Spectrum graph
4. Shortwave unlocking (high noise, SSB unavailable, etc., not recommended)
5. Snake (x)
It seems that Qiansheng was planning to use the K5/K6 approach to move from low-end to high-end, but they were surprised by how cleverly the "Geeks" in Ham implemented it.