What's in the wedding kit?

The hair of the newlyweds.

According to relevant public information, the hair of the newlyweds is put in the wedding kit, indicating that they are married.

Toolkit is a bag made of silk, satin, silk, etc. In ancient times, it was used to hold letters as envelopes. Brocade itself refers to good-looking or good-quality satin, such as the icing on the cake and the beautiful mountains and rivers.