Why didn't you post this two weeks ago, when I was actually in Shanghai?
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Any Shanghai visitors should also drop by a little shop in Taikang Lu which is a museum of old film cameras, half Chinese (Shanghai 58 leica III copies, Chinese TLR's, Chinese 35mm RF's, etc.) and half Leica/Rollei/etc.
They also have some for sale but they are Western tourist priced.
It's easy to identify because outside there are two big Socialist Realist style sculptures of a Chinese man and woman holding TLR's. Very cool place.