$Sunac China(01918.HK) sold at 2.9 yesterday and bought at 2.24 today, keeping the base position unchanged and day trading the additional positions. As long as you trade stocks, it's impossible not to step on a bomb. A true expert isn't someone who buys at the low and sells at the high every time to make a smooth profit, but someone who can turn the situation around and turn losses into profits after stepping on a bomb.