How do you say

I have bought a long-sleeved top.

..in Chinese?

我新買了一件長袖上衣。

wǒ xīn mǎi le yī jiàn zhǎng xiù shàng yī 。

How do you say "A month later, the baby had his or her first birthday party, at which the whole family gathered for a sumptuous meal." in Chinese?