If there is no obvious sign, the unused ones can be used. If there is an obvious sign of the Year of the Tiger on it, it can't be used.
Red envelopes, also known as red envelopes, are small gifts made of red envelopes. It is often used in various celebrations under the background of China traditional customs and Chinese cultural circle, including Chinese New Year, weddings, birthdays and other occasions. Their colors represent "celebration" in China culture.