It doesn’t matter at all! There is no need to imitate Westerners! To put it bluntly: when blowing out the candles, several people's spit foam will fall on the cake. Besides, candles themselves are not clean. As soon as they are inserted into the cake, bacteria will already get in! What's more, candle ashes falling on the cake are unsightly and unsightly. If the lit candles are on a certain altar, there is no need to worry about how many candles are good or bad.