Yabla video uses of 信封

就是 jiùshì
qián
fàng
zài
xiàng
这样 zhèyàng
红色 hóngsè
de
信封 xìnfēng
zhōng
叫做 jiàozuò
红包 hóngbāo
It is to put money into this red packet. Therefore, it is also known as Hongbao.