Why use pause instead of comma in this sentence?

"Economic development, urban expansion, rapid population growth and improvement of quality of life" is a coordinate phrase in the sentence. In addition to "improving the quality of life", the conjunction "he" is used to express the coordinate relationship, and the pause between the coordinate words in the sentence should be used in the other two places.

The use of punctuation marks is based on People's Republic of China (PRC) (PRC) national standard GB/T15834-2011punctuation usage.

According to national standards, a pause is a point in a sentence, indicating a pause between coordinate words or after some ordinal numbers in a paragraph.

The basic usage 1 is used between coordinate words. There are such examples in the standard:

Example 2 involves coordinate phrases: scientific modeling, exquisite skills and vivid charm, which are the characteristics of stone carving in the prosperous Tang Dynasty.

It can be seen that the two pauses of "economic development, urban expansion, population explosion and quality of life improvement" should be marked as a pause (,).