Isn't it trademark infringement to take a nickname after liquor?
No, infringement is the prior right of others, and nickname does not belong to the prior right, so trademark does not belong to infringement. Mbth (Liquor) is distilled liquor with grain as the main raw material, Daqu, Xiaoqu, bran koji and distiller's yeast as saccharifying and fermenting agents, which is cooked, saccharified, fermented and distilled.