How to get the Q version of Portrait of the Traveler?

The game will open a blue boutique from time to time. Players can use the accumulated blue essence to buy colorful skin and skin props. It used to be held twice a year. Every time I open a store, I will sell the Q version of the avatar, but I can't specify the purchase. It's random. Of course, the big money can be allin. I only buy one, and the rest of the essence will buy colorful things.