During my second visit within 4 weeks to Shanghai, I decided to hunt for the bw film brand i only heard of before: "Shanghai". Same location, "Xing Guang Photographic Center". I found a shop only selling large format equipment - How do they survice ? - having stock of these brand. I bought 2 boxes, 80 RMB each (about 8 Euros), each box contains 48 sheets. Also get another four 4x5 film holder. Next weekend will do some test shots and enlighten you with the results.