How to improve the level of QQ game baby?

Qq game treasures have flexible grades, ranging from 1 to 4, that is, from 1+ 1 to 4+ 10, with the lowest 1+ 1 and the highest 4+ 10. So how to upgrade from 1+ 1 to 4+ 10? First of all, players need to prepare a 1+ 1 baby. Of course, don't engage in ballet pigs or hum with those GG, MM, etc. Don't waste the QB upgrade level because of worthless baby. Generally, you only need to upgrade the level of the baby after you get the rare baby. So which babies have the value of upgrading? For example: 1+/Kyubi no Youko Fox, 1 Golden Snake, 1 Pig Bajie,1Tang Priest, 1+ 1.

Qq game baby suitable for upgrading.

The best way to upgrade the level is: players can open Baidu to search the qq game baby trading paradise, enter the paradise and use 1+ 1 or other rare babies to make a pig, and then strengthen it from 1+ 1 to 3+1and then from 3+1. Specific operation methods: 1+ 1 need 10 to strengthen the stone to 2+ 1, 2+ 1 need 10 2+ to strengthen the stone to 3+. Ordinary babies and animal babies, constellation babies should not be upgraded.