CNY250,000 would be suggestive of legal importation (with applicable taxes & duties paid) and subsequent legal documentation and therefore being able to get legal plates etc in those jurisdiction that allow motorcycle registrations. That price is around the those of the legal available big bore motorcycles from Honda; ST1300 and Suzuki; GSX1300R Hayabusa & M109R.
If this is true then it begs the questions, is J going legit?