Yes, indeed, it was a conundrum, the issue of centralized land transfer in rural areas. On the matter of duration, there was indeed an oversight. Policy-wise, no clear standard had been determined.
Ten years is not a short duration. Within ten years, anything can happen, and nobody can say for sure. It's possible that the current large-scale grain farmers might suddenly experience a turn of fate, resulting in an inability to fulfill their promises. It's also possible that, upon seeing the benefits of agricultural planting, the farmers might have second thoughts and become unwilling.
That duration of ten years is too long. There are too many unexpected events that could occur. The variables are too substantial. Should something go wrong, Jiang Jingu knew very well that he could not shoulder that responsibility.