Generally speaking there are two types of Chinese scammers online:
1. Non-registered scammers
In China, esp in some poverty-stricken areas or less developed areas, you can see scammers everywhere. ' Money makes the mare go.' With enough money, you can make everything, like fake diplomas, fake IDs, fake goods, fake certifications, fake tickets, replicas of branded goods etc. By submitting some fake IDs, some scammers can register themselves and pass the surveillance of some foreign business to business platforms like www.tradekey.com, www.alibaba.com, www.go4worldbusiness.com etc. By this way, some scammers have come to obtain some trust from foreign buyers worldwide. Usually, they never offer real information about their add, tel, fax, legal person names, detailed company profile etc on their websites. I've checked out dozens of such kinds of scammers for foreign buyers in China. Some scammers created a wrong add or contact information online. E.g. Room1302, Building 6, Tianjin Road, Tianjin City, Fujian province. Tel: 0594-55554777, Fax: 0594-5555688 This place doesn't exist in China at all. No cities is called Tianjin in Fujian, Tianjin is a big city in North China. This tel number is not a registered company number, not exist at all and the fax number does not exist either. Business scammers cannot offer you a right company number and refuse to answer local Chinese's verifying questions. Normally they attract foreign buyers with very low prices and then ask buyers to pay some down money as a guarantee etc. They will disappear after steal your money or they will send you some defected goods or replicas etc.
2. Registered scammers
You have to be more cautious with this kind of scammers in China as they seem quite legitimate and honest in China. They can offer you every legitimate document issued from Chinese government. For example, in August this year, Mr. Xu from a famous hair product manufacturer in China signed an contract with Ms Lindova from Romania, everything seemed ok because Mr. Xu was the salesman from that famous manufacturer in China. However, I note that the PI ( proforma invoice ) offered by Mr.Xu was not issued by the real manufacturer, it's issued by a trading company hundreds of kilometers away!!! And this trading compay had nothing to do with this factory. Why didn't Mr.Xu sell the products directly from this manufacturer in case it had its own right to export? I found out that Mr.Xu was a business scammer here because he was selling the goods in name of that manufacturer but he was buying low quality from other factories and trying to get all profit for himself!