In the first years of my marriage I was under a heavy debt for house building. Moreover, during that period our pay had been always overdue by several months or even half a year. At such hard times, wife would take charge of borrowing money to cover our daily expenses. Sometimes I had to share the humiliation to seek financial aid. Once I was pressed to pay a debt ahead of schedule when I had no cash in hand. So I had to ask help from one of my close colleagues. It was at that time I began to provide room and board for some students to ease my straits.