I feel I need to tell you this, the Jincheng corporation makes imitations of Honda bikes.
The Knight is an imitation of the Honda CT50 and the Singa or Bigfoot is an imitation of the Honda Z50 and Jincheng also makes imitations of the Honda Astrea and Chaly ond other Honda's, but these imitations are of low quality, that's why they're cheaper than the originals.
The original Honda's are really good, if you treat those Honda's right they'll last for at least 25 years. I'm a big Honda fan, especially the oldtimers. I've got 4 fourstrokes at this time, the youngest of these is from 1972, the oldest from 1963, and they all still run great. The Jinchengs however will never last that long, their quality is simply inferior.