If baby cries is because of 有好多肚(腸)風 then you can try to give him/her GRIPE WATER. There is one quite famous called 肥仔水. My babies tried and it's really work they don't cry in the midnight anymore, I usually add in the milk after bath. Also put 保心安油 on the tummy (rub in hands to make warm before apply) is also good to make them 放屁.