The Whole Nation Has Amnesia and Is Cultivating Immortality, but I Haven't Forgotten Anyone.

There are only two ways in this world: if you don't cultivate immortality, you will be corroded by the turbidity and will not live past fifty; if you cultivate immortality, you can practice "Nine Recollections of Life and Forgetting Life". The higher the cultivation level, the cleaner the memory will be forgotten. After Chen Du broke through the first level, all his memories were restored the next day, and there were still fragments in his mind that did not belong to this life. What secret is hidden in an orphan picked up from a mass grave?