How to understand Article 22 of the Detailed Rules for the Implementation of the Patent Law

Article 22 of the patent implementation rules? A dependent claim of an invention or utility model shall include a quoting part and a defining part, and shall be written in accordance with the following provisions:

(1) citation part: indicate the number of the cited claim and its subject name; ?

(2) Defined part: indicating the additional technical features of the invention or utility model. ?

Subordinate claims can only refer to previous claims. Multiple dependent claims that cite more than two claims can only cite the prior claim in one way, and shall not be used as the basis of another multiple dependent claims. ?

He has three meanings:

Dependent claims include a quoting part and a defining part: a kind of XX according to claim X, which is characterized by XX (quoting part in front and defining part in the back).

When the dependent claim refers to the previous claim, it can only be X according to Claim A or Claim B, which is characterized by …, but not X according to Claim A and Claim B, which is characterized by …

3. Can't quote? Claims referencing multiple claims!

For example:

Weight 1, technical feature a;

Right 2, adding technical feature B on the basis of right 1;

Right 3, adding technical feature c on the basis of right/kloc-0 and/or right 2;

Then the next right 4 cannot refer to the right 3.