The upgrade system of Meng 100 is very interesting. It is to eat (by mistake) and wait for the prince to upgrade, and you can also gain experience by making copies.
We need an educational cat if we want to upgrade. General education cats will fall in the daily copies (training tasks) of12: 00-18: 00- 19: 00, 22: 00-23: 00. There are some special educational cats that need activities to appear. Don't worry, just wait slowly.
However, educational cats also have many attributes, and the meow attributes that appear every day will be different. For example, education cats can only be painted with red and blue attributes on Monday. Grasping the time when educational cats appear is the key to upgrading.