Hong Kong Brewery visit 1957 at Sham Tseng.

This is a photo of a mate -Johnny Eastman - taken during a brewery outing, I remember after a tour around the brewery we were then locked in a room with a free beer barrel!, Have looked on google for a brewery -Yuan Long- is named but that did not open until 1996. Rear of my photo says-May 1957 at San Miguel-. I was at Sham shu po at this time. Where would this have been.??