Yangmei trees are cultivated primarily in southern Zhejiang Province. They only bear fruit about six weeks a year, and, at the time of writing, we're at about mid-season. Ripe berries are usually a dark reddish purple. The flesh is pulpy and full of juice with a flavor akin to blackberries. The downside is that flies love this fruit too. So much so that they've been known to lay their eggs in them. They're harmless. But yeah, we know. Gross. Still, don't be deterred. Soaking them in a salt water bath for about 30 minutes will kill or extract any vermin. After that, rinse them off in fresh water and they're ready to eat.