2. Write first and then change, and the abstract of the instruction exceeds 300 words. Written after revision, the instruction is less than 300 words.
It is not impossible to write like this, but it is somewhat general; If you submit a modified control page, mark which words you deleted on the control page, and that's it.
If you don't submit the revision control page, you'd better write out the changes in the original text, such as.
Before modifying the second line of the instruction summary .../kloc-0 1234567890 ...;; After revision ... 1290.
Before modifying the fourth line of the abstract: after modification ... A, B, C and D ...;
This is clearer and makes the examiner look more comfortable.
If you have any questions, please ask.