Be very careful using this site...
I booked a ticket from Chengdu (China) to Hong Kong and was charged HK$ equivalent 3531. I subsequently discovered a similar seat, on the same date, cost HK$2690 a difference of HK$841. When I asked why my ticket was so expensive I was offered HK$ equiv 351 as Ninja cash. I queried this and was eventually offered Ninja cash for the full difference amount. Despite my many requests to issue my ticket and reassuring messages that issuance was imminent, my ticket was not issued. I did receive a refund. A stressful experience, I will not use this site again.