Tóngshì jiéhūn, wǒmen còu qián mǎi le jiéhūn lǐwù.
A colleague's getting married, so we chipped in for a wedding gift.
Tips
culture
Red-envelope 红包 cash is the default. Amounts carry etiquette: avoid 4 (sounds like 死, death), prefer pairs 双数; common figures are 288, 388, 588, 666, 888, and 1314 一生一世. Gifted physical items tend to be household goods or gold jewelry.