Cordyceps are wild, growing at high altitude, Hong Kong is not the place of origin. You said the finished product should be produced in Japan, the main role is to improve sleep, improve resistance. Hong Kong is generally not fake, Hong Kong's regulation of medicines is also very strict, found fake drugs to deal with is also very serious, closed and sealed store more than, but also be sentenced to imprisonment. Go to a regular pharmacy to buy drugs will not be fake, generally have the Drug Administration people regularly sampling. The mainland has this kind of medicine is not clear, good drugs are designated for sale, the mainland does not have the right to sell agents can not be sold. You check the online store to see if you can find it. I hope to help you.