Rui Xi.
1. The pronunciation is more beautiful: Rui Xi’s pronunciation is more harmonious and will not make people feel awkward or harsh, while Yu Xi’s pronunciation is slightly duller than Rui Xi’s.
2. The meaning is deeper: the word Rui in Rui Xi has a subtle and delicate meaning, while the word Xi represents the tide at night, implying that girls have a delicate mind and a strong will. The word "yu" just means speaking, and its meaning is relatively simple.