The most important thing to avoid is to put all the beef into the hot pot and cook it for half a day, then fish it up and eat it. The beef is very thin and tender, so when you eat it, you can use a slotted spoon to shabu-shabu the pot a little bit, and then you can eat it when it changes color. Basically, when it's ripe, it's the best, but when it's ripe, it's not good anymore, because the butter has melted away, and there's no taste of cow, and the meat is old, so it's not good for biting.