The answer is simple: Much, but be consistent! As with any dog you start early teaching them all sorts of day things such as sitting before you feed them, before crossing a street, when cleaning teeth, or when checking ears. Teach them gently and patiently (which is easier said than done) while rewarding them generously. Reward the puppy with an exaggeratedly friendly voice. Never ever get angry with the Chow. The result will be the reverse from what you wanted to achieve in the first place. Also never show the Chow that you are actually in a hurry or that you are in a bad mood. The result of this human behaviour will immediately have a reaction on the Chow. Instantly they will be difficult to handle, will not listen, and they will be super slow.