Zhuge Qingqing indeed did it on purpose.
The money originally spent on Shi Yiqing and Min Zekai wasn't necessary in such a large amount.
But...
Don't forget she is the number one strategist of Wolong Town!
This title isn't just for show.
As the number one strategist, of course she wouldn't let Shi Yiqing enjoy the benefits for nothing.
They're all adults, don't they even understand the simple logic that one must give something to get something in return?
Min Zekai didn't catch on at first, he simply thought Zhuge Qingqing was showing off her newfound wealth, planning to flaunt it when the opportunity arose.
Who knew this was Zhuge Qingqing's true intention?
If they had only spent a little of Zhuge Qingqing's money, it wouldn't have been a big deal.
Even if they breached the agreement, it wouldn't have been too far.
But this nearly twenty thousand expenditure, if they don't give Zhuge Qingqing an explanation, then they really can't justify it.