21.  In social systems where people are usually divided into castes or ethnic groups, boundaries among different groups and races can be easily found.

22.  Advanced equipment and quality control system should be updated timely.

23.  For the company itself, the most essential thing is to become more and more creative and develop its own brand and research system.

24.  Now that our quality control system can make sure that the products are reliable, we should put more efforts on dealing with affairs related to consumers.

25.  With the hard work and enthusiasm of our staff and the help of our quality control system, we have the confidence that we are to do a better job in the near future.

26.  Admittedly, learning English is never a convenient project for Chinese students, as the Chinese language is of huge difference from the English language, both in terms of their spoken and writing systems.

27.  Nonetheless, as we, the victims of education system, all know, testing is a negative way to study.

28.  What they want is a fair, justified value system which is over the boundaries that are unnecessary and impossible to break.

29.  So building and fixing such a system is what we ought to do.

30.  We have already established an integrated system of quality control.