Known as hong bao in Putonghua and lai see in Cantonese, red packets containing 'lucky money' are presented to children and single adults during Lunar New Year celebrations. The money enclosed in these red envelopes should be of an even amount (for example: HK$80, HK$100 or HK$200), which is considered auspicious. It should not be an amount starting or ending with the number four, which represents 'death' in both languages. Each adult usually gives one packet, which is why married couples will give two. Unmarried individuals are not expected to hand out lucky money.
The word hong implies 'vast', thereby suggesting the money will multiply. It's believed that giving and receiving red packets bring good fortune to all, as those who give will, in turn, receive. Those who receive should thank the giver graciously, saying do jeh in Cantonese or xie xie in Putonghua. The envelope should not be opened in the presence of the giver, otherwise bad luck will befall the receiver. Lucky money should be saved.
In Asia, fung shui consultants receive lai see from their clients. The clients use their discretion to give an amount commensurate with the expertise of the master. Failing to do so will bring bad luck.