What do black group and white group mean respectively?

The white skirt is the real splendor, which means like a famous brand machine. The hardware and software will be repaired when you buy it. This kind of dressing has the least trouble, the least problems and the highest performance utilization. It can use all the functions of Qunhui, the only disadvantage is that it is expensive.

Black skirt is the antonym of white skirt, which means piracy ~ buying spare parts and assembling them by yourself, and then installing the system by yourself, which is very troublesome, but cheaper ~ some remote service functions that need to use Qunhui domain name will be missing.

Hope to adopt!