What should my brother and sister-in-law get for their birthday?

It depends on how much money you want to give. I think we can send something practical at home, such as belts and watches (there are some cheaper ones, and I recommend Guzun's slightly better one, because it is cheaper than other famous brands, and generally 50% discount is enough). I think women have too many choices, such as clothes, wallets, scarves and parasols. You can also send some household items, such as tea sets and bowls, but they are more expensive. You can also send handicrafts and look online. Juanren is very good.