avoid ODD numbers - e.g. 3 notes, 5 notes, 9 notes in one red packet. Always in pair, or multiple of 2, i.e. 2 notes, 4 notes. But the numeral '4' is not auspicious. If u thinking of $100, give 2 x $50 notes or 2 x $50 and 4 x $2 = $108 = Sure Huat! also total 6 notes - '6' is good in Chinese...