The service clauses before selling:
1. To investigate and forecast the client's requirement.
2. To communicate with client adequately to understand client's
  demand.
3. To supply the samples and the technology information to client.
4. To offer others: packing design, precative test, battery technology
  support, battery knowledge training etc.
The service clauses after selling:
1.To respond client's questions.
2.To help client to do product test and supply technology report.
3.To supply technology, system, and instrument information.
4.To supply the training of product features and using methods.
5.To dispose complain: to respond client's complain in 24 hours, and
  offer the improving report in one week .To investigate Client's
   opinion per season.
7.To evaluate client's demand and offer a reasonable suggestion.