Zhang Fei electronic engineer training video set.

His first step is free, and the remaining four steps will cost money! Even if someone copies the video to you, you can't see it. At present, all the things you pay to watch are encrypted with encryption software such as Golden Shield. Usually, one cpu corresponds to one code. If I copy it to you, I can't read it without a password! Some encryption algorithms take decades to crack!

I only have his first step, and I didn't buy the other four. It feels a bit expensive! Step one, he released the address of the network disk!

Hope to adopt