Sister usually doesn't receive too many red envelopes from her own sister when she gets married, so it would be great to send a suitable wedding gift. It is suggested to send a pair of pendants, which can be discussed with parents, preferably Yu Pei. Each of you is a soul mate, which will also have an appreciation effect and can be passed on to the next generation.
If you want to give creative wedding gifts, recommend a real doll and a crystal piano music box. Congratulations, chocolate and so on.