What is the single principle of patent application, and what should I do if it does not conform to the single principle?

Simplicity means that the invention belongs to a general concept. Specific to the parallel independent claims, to meet the requirements of oneness, there must be more than one identical or corresponding specific technical features. The so-called specific technical features refer to the technical features that contribute to the novelty and creativity of independent claims, but not other technical features. If two independent claims lack the same specific technical features, they are not single. For example: right 1: a heating wire right 2: a heating tube with the heating wire mentioned in right 1 right 3: a rice cooker with the heating tube mentioned in right 2 If the heating wire mentioned in right 1 is novel and creative, then right 1, right 2 and right 3 are integrated.