No need.
Part 2, Chapter 2 of the "Patent Examination Guidelines"
2.2.3 Background Technology
The background technology part of the description of the invention or utility model shall state the relevant Background technology useful for understanding, retrieving, and examining the invention or utility model, and citing documents reflecting these background technologies as much as possible. In particular, it is necessary to cite the prior art documents that contain the technical features of the preamble of the independent claim in the invention or utility model claims, that is, cite the prior art documents that are closest to the invention or utility model patent application. The documents cited in the specification may be patent documents or non-patent documents, such as journals, magazines, manuals and books. If citing patent documents, at least the country and publication number of the patent document must be stated, preferably including the date of publication; if citing non-patent documents, the titles and detailed sources of these documents must be stated.
In addition, in the background technology part of the description, problems and shortcomings existing in the background technology must be objectively pointed out, but only those problems and shortcomings solved by the technical solutions of the invention or utility model. If possible, describe the reasons for such problems and shortcomings and the difficulties encountered in solving these problems.
In addition, in the background technology part of the description, problems and shortcomings existing in the background technology must be objectively pointed out, but only those problems and shortcomings solved by the technical solutions of the invention or utility model. Where possible, describe the reasons for such problems and shortcomings and the difficulties encountered in solving these problems.