What kind of paper is good for diy business card printing?

Now I have been printing the game king, sorting out the information in word, and printing directly on coated paper in the store, two or three sheets each (at the school gate, if it is somewhere else ...). The coated paper is still relatively thin. Buy some opaque card sets on the back, hold them with poker (calculate the size), and insert the cut pictures directly. This is what I'm going to do. A pair of my powerful cards, 20 yuan.