Top = on, lower = off. Or at least that is the way the choke lever works. Nunya is correct. Choke closed it up and open is down. The Chinese 2 strokes warm up reasonably fast. About 30/45 seconds and your engine should run normally with the choke wide open in moderate weather. The colder it is the longer you'll need some choke, lever up...but not all the way.
What's the matter; you can't read Chinese?