Has anyone booked with Chinatouronline.com?

Where is their office and registered address? If it is in the Mainland China then many things could happen. In case of doubt make your payment by a secured system and not visa card. You could also try checking out discounted fares of Cathay Pacific on their website. Mainland China's domestic fares are easily booked and issued in Hong Kong, there's travel agents all over the place. Check www.DiscoverHongKong.com and enjoy!