My colleague kept asking me how much money I had saved over the years. I said, "Why are you asking about this?" She smiled and said, "I'm just curious, how much can a middle-aged person save?" I casually replied, "Probably around 500,000 to 600,000." Her eyes lit up: "Lend me 300k, for half a year." I quickly tried to make up for it: "Not that much, all in my wife's hands. Do you want 30k?" She readily agreed: "Sure."

Once the words were out, I had to lend her 30k. Unexpectedly, after three months, she paid the money back, and even gave an extra 5,000. I declined to take it, but she said it was fine, that she made a good profit with my money. Then she sighed: "If you had lent me 300k back then, I would owe you an extra 50k now." I lamented: "What a pity." She took the opportunity to say, "How about this, you go home and think about it, lend me 300k this time for half a year, and I promise I won't let you down."

I told my wife about this when I got home. She immediately said, "You can't lend a single cent more." The 5,000 extra I gave you before was like buying bones with gold, just to gain your trust. If you lend out the 300k this time, I guarantee you won't get it back.