God-level boss: traveling to another world

For an unknown reason, Feng Yuan, who was an emperor and was in the process of nirvana, was actually in the body of a weak human. She thought it was because of the failure of nirvana, but she didn't expect that she had a spirit-absorbing system? With the heart of making the best of it, the goddess-level empress chose to quickly integrate into the world of this weak human. From the empress to the weak human, it was a big blow to Feng Yuan. However, she was happy and leisurely, at least she thought that she would not be busier than the empress at present, right? However, this world is a bit backward, forget it, just take it as a vacation for yourself, and slowly collect spiritual power to go back, right? But what puzzled her was that this world...