Master, please don’t bring Feng Aotian back again!

Cultivation system settings (revised version)
(The story of the novel is driven by the plot, and the cultivation system plays a more auxiliary and explanatory role. I just hope it will not affect the subsequent reading experience of the novel.)
Immortal cultivators enter the Tao with spiritual energy, and different levels are derived as the realm changes. During this period, each level is divided into the initial realm and the great perfection.
From this, we can get the order: Qi training, foundation building, Dan (golden elixir), Yuanying, Shenhua, Lianxu, Fusion, Mahayana, and Crossing the Tribulation
When entering the stage of tribulation, one must face the threat of heavenly tribulation at all times, and if one wants to break through, one must fly into the immortal gate, be listed in the immortal class, and not stay in the human world.
According to the setting, the Xuanyu is in a period of weak spiritual energy, and fewer and fewer people can ascend to become immortals. In the later stage, the immortal gate may even be closed and no longer breed true immortals.