1. Wedding red envelope: A sister can give a wedding red envelope to her younger brother and sister-in-law, which is the most basic and common gift.
2. Honeymoon trip: My sister can give my brother and sister-in-law a sweet honeymoon trip, so that they can enjoy romance and relaxation during the trip.
3. Furniture and household appliances: Sister can send some furniture and household appliances that newlyweds need, such as beds, sofas, curtains, washing machines, televisions, etc.
4. Kitchenware: My sister can send some practical kitchenware, such as tableware, toaster and coffee machine.
5. Wedding dress: My sister can send some wedding dresses to her brother and sister-in-law, such as dresses, wedding dresses and shirts.
6. Flowers and decorations: My sister can send some flowers and decorations, such as vases, flowers, murals and ornaments.
7. Wedding photography: My sister can take charge of wedding photography and record the beautiful wedding moments of my brother and sister-in-law.
8. Wedding assistance: My sister can help my brother and sister-in-law arrange the wedding to ensure the wedding goes smoothly.
In short, the elder sister can choose appropriate gifts and ways to bless the wedding of her younger brother and sister-in-law according to her own financial ability and preferences.