When applying to register trademarks in China, e-commerce platforms 
are generally advised to cover both class 35 and class 42. From the 
perspective of a lawyer, such advice is safe and can charge more. 
Actually, most e-commerce platforms do not have to register trademarks 
in class 42.
It seems that some service items in class 42 (subclass 4220: computer
 programming and relevant services) are highly closed to the nature of 
e-commerce service, e.g., the service items “maintenance of computer 
software, cloud computing, creating and maintaining websites for others,
 etc.” Though most e-commerce platforms would use these services in 
their operation activities, it should be noted that in this situation 
the e-commerce platforms are usually the role of service receiver, but 
not the role of service provider. As an example, an e-commerce platform 
would like to establish its website, the provider of the service of 
creating website is not the e-commerce platform itself, but the company 
who providing the service of creating website. In this connection, the 
latter is indeed the entity which needs to register trademarks in class 
42.
Of course, it does not mean that class 42 is not important for 
e-commerce platforms, those which primarily providing technological 
support such as Taobao and Amazon still need to register trademarks in 
class 42.
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