Red envelopes are often presented at social and family gatherings such as Chinese weddings or on holidays such as
Chinese New Year. The red color of the envelope symbolizes good luck.
The money amount contained usually begins with an even digit (traditionally mostly anything involving the number 8), as odd numbered money gifts are associated with funerals. At weddings, the amount offered is usually intended to cover the cost of the attendees as well as help the newly married couple.
During
Chinese New Year, red envelopes are typically given to the unmarried by the married, regardless of age.
From the old saying goes, the money in the red envelopes are not suppose to be open for usage until
Chinese New Year is over, else bad luck befall on you for the whole year.