You aren't going to turbo/supercharge a Chinese 2 stroke. The effort and expense go far beyond the reward and in the end you have to change so much it isn't a Chinese 2 stroke anymore.
To begin with there are no exhaust valves so you have to figure out how to contain any boost. Open exhaust port = no boost. The only way to achieve this on a piston ported 2 stroke is with the use of an expansion chamber. Even then this creates a boost condition in only the very narrow band the expansion chamber is tuned to. This makes for an extremely peaky motor that is unsuitable for street use.
Beyond the problem of having no exhaust valves you still have to solve a myriad of other problems regarding cooling, strength, reeds, and yes even the seals you mentioned.
I have only ever seen one example of a piston ported 2 stroke being boosted and it was on a water cooled Minarelli race engine designed for the salt flats. Even the builder said the motor was extremely peaky.
http://www.buddfab.net/motor.html
The motor they started with is so superior to a Chengine in every way it is like comparing a million dollar formula 1 motor to whatever is under the hood of a Yugo. In fact it would be easier to boost the Yugo than a Chengine. At least it is a 4 stroke.
If you are interested in turbo/supercharging a 50cc motor at least start with something like one of the 4 stroke Honda's. Being a 4 stroke and having an exhaust valve makes the potential for success much much greater. I would be much more interested in seeing the results of experiments with a smog pump on a 4 stroke. Is a smog pump a fan or a compressor?
To the OP, A fan and a compressor are two different things. To create boost for a motor you need a compressor. This subject has been discussed many times before and if you search you will find lots of information. People have even tried the computer fan idea before and tried to augment it with a venturi type enclosure. (google 'venturi effect').