What handwritten letter should I buy for my friends when I travel to Shanghai, Hangzhou and Suzhou?

I have been to all these places. If Shanghai goes to the World Expo, you can look at the souvenir shop inside. There are those small and special ones with moderate prices.

I haven't bought anything in Hangzhou, so I don't know much about it. It is said that Suzhou and Hangzhou embroidery is very famous, so you can refer to it. There are also some handmade fabrics. Really can't. You should bring some special snacks. There are many special snacks there.