If Wei WuXian lost his memory after his rebirth and didn't recite that song, Lan WangJi might be able to find him. This was because the character's personality, behavior, and motivation in novels were usually shaped by the plot and plot rather than determined by simple settings. If Wei WuXian had lost his memory after his rebirth and didn't sing that song, he might have fallen into confusion, not knowing what to do or say. However, this did not mean that he had no memory at all. It was very likely that he would recall his previous experiences and interpersonal relationships to find Lan WangJi. As one of the main characters, Lan WangJi's personality and behavior would usually have an impact on the plot. If he was confused or worried about Wei WuXian's memory loss, he might try to find Wei WuXian through all kinds of methods, including asking others or looking for clues. If Wei WuXian lost his memory after his rebirth and didn't sing that song, Lan WangJi might have a hard time finding him, but he would find him eventually. After finding him, he might try to rebuild his relationship with Wei WuXian or help Wei WuXian recover his memory through other means.