This is a Steganography software. It hides a data within a picture using LSB encoding. It can then un-hide the data from the picture. The user can encrypt the software with a password.

STM8技术资料文档，找了好久才找到，不敢私藏，需要的拿去用(Stm8 technical data and documents were found after a long time. I dare not hide them privately. Take what I need)