C421 Jealousy
Sawakita is not a small family, and since this is a family matter they don't want to make public, naturally they don't want others to get involved.
If the Shi family didn't get Zuobei Tang's permission to interfere in this matter, it would only make Zuobei Tang angry, and cause a serious conflict between the two families.
It was obvious that this was a strenuous and unrewarding task