   Possible Duplicate:   What are some good resources for learning Knife Skills?       I'm about to join some cooking classes but I'm totally green at this sort of thing.  So I can preserve some of my humility and not look totally incompetent - how can I learn to cut quickly and efficiently without lopping some fingers and limbs off in the process? 
My best guess would be wampee fruit - has roughly the same size, shape, and stem colour, and obviously comes from the same region, although I'm not sure about the interior:    It's hard to tell from the low contrast in the photo but it could also be loquat, AKA "Japanese Plum".    Only problem with the second choice is that loquat usually has full-on brown branches as opposed to green stems - so it's probably the wampee. 