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When you start to build your own shopping cart, you have to choose the solution carefully.
Sometimes when the shop owner choose the solution carelessly and complete their shopping cart without knowing the shopping cart technology very well and the instruction of the expert, it will cause many unpredictable consequences.

1. The misplay of choosing the shopping cart software result in the unsafety and instability of shopping cart. For instance,some nameless new systems were not tested long and safely.
2. The unreasonable basic construction of shopping cart is not suitable for the promotion of SEO, such as the shopping cart software of not supporting SEO.
3. The confusion of the logic and view of shopping cart increase the cost of upgrade even can not upgrade. For instance , some shopping carts created by small companies .
4. In order to pursue the personality, the system logic of the shopping cart template design was modified tremendously, which undoubtedly embarrass the upgrade of system soft.
5. Not know PHP/MySQL,ASP/ASP .NET/SQL-Server,Coldfusion,Java well, which cause the increase of the cost of server afterwards. For instance, Choosing .NET will pay more than PHP of free open-source.

The above problems are in the level of technology. As a shop owner,you are unable to know and judge these things,which need the responsible suggestion from the professional shopping cart company.

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