Patent writing has improved a small part of the larger system. How to write the patent claim for utility model?

A system includes control system and mechanical parts, including 1, 2, 3, 4, 5 (writable or unwritten). The control system includes A, B and C (writable or unwritten), as well as A control 1 and B control 2, 3 and 4. Characterized in that the control system also comprises d and e.

Note: Claims can also be divided into:

... characterized in that the control system also comprises a d, d control 1.

2. A certain system according to claim 1, characterized in that the control system further comprises an e, and the e controls 3.

Of course, you can switch between d and e, as long as you meet the patentability.