Study the Standard and ask a lot of questions. There is no such thing as a silly question. The breeder should care more about where the puppy is going then selling a puppy. Not all homes are the right environment for the Shar-Pei and visa versa. There are a lot of good breeders but there are also a lot of bad breeders.
All puppies are cute and loveable.
Do not fall in love with the first one. Try to see more than one litter and talk to several breeders. If the breeder is not helpful and full of knowledge, move on to the next breeder on your list. Diet and Vitamin supplements are a very important factor in a healthy puppy. The first several weeks of your puppies life is crucial and can impact the rest of its life, emotionally and physically.