Weishi is a lovely modern replica of the vintage Gillette TTO Super Speeds. It is Twist-To-Open (TTO) type of razor. It means that when you turn the knob at the tip of the handle, the butterfly doors will open revealing the slot where you place the blade. Just drop the blade in and turn the knob in the other direction. Doors should close now after which you are good to go.
Weishi is a closed comb safety razor. While the handle seems to be made out of brass, the head is most likely made out of zamak (pot metal) because of the rusting issues this razor has. The TTO mechanism often works fine but seems to deteriorate rather quickly causing the doors to close incorrectly. Another common problem this razor has is the blade misalignment problem. While closing the butterfly doors, the blade seems to get misaligned. This means that one side has more blade exposure than the other hence one side is more aggressive compared to the other.
But all things considered, it is still good value for money. It is very affordable and the quality issues we mentioned are not that common. Yes, it probably will need replacing at some point, but all razors usually do. By that time you have already saved some money.