You won't feel lonely even if you reached the upper limit in ShiFu because you can promote further through reincarnation system where you can rebirth. After you reached lv70 by completing the main quest, you have the privilege to unlock the reincarnation system.
After you completed reincarnation, your level will be restart from lv1 and the level will be indicated as "1R LV1". At that time, all of your equipment won't be changed and you will be more powerful. If you want to rebirth for the second time, just reach lv70 in the first reincarnation.
The compete rebirth guidance is as follows:
