I do not think he actually met her in the past. Remember that things are different now. Before, he used the magic book to ascend, he didnt directly get sent to this sect, nor did he have a heaven spirit root to get him into the best classes, nor did he practise an expensive cultivation method that forces him to do jobs for spirit stones. He never met Gu Bei nor his sister. He never met Long Yuyin, or the young master of the nether world. All his friends from the little world, at this point in his past life, were dead.