In the past, out of family affection, I spent years handing over the company's computer procurement orders to my sister-in-law to manage. For a decade, I supported her to safely weather the industry's low period, helping her family sustain their livelihood and set up their household business. I thought treating each other with sincerity would trade for gratitude, but who knew the other party would turn greedy and break the contract unilaterally close to delivery, abandoning my cooperation to take on a high-value order, and even bluntly stating that she despised our orders for their meager profit and tedious effort. Even my own brother secretly grew resentful, completely forgetting the kindness of past support.