There is an unknown secret hidden behind the breakup of Mr. Han and Su Qing. This secret is related to their respective families. It may be a business transaction, a family scandal or a past grudge.
Mr. Han's family may have an unknown past, and this secret may involve illegal transactions, power struggles, or betrayal among family members.
The reason why Su Qing left Mr. Han may not be just a superficial misunderstanding. She may be carrying family secrets or her own secrets, which are gradually revealed in the story.
Intention: Grudges between wealthy families