Who is the source of the surplus grain in the fields? The original text of a passage in the Records of the Historian was "The fields have surplus grain, but the people are not enough to eat." It meant that in an agricultural society, the land was developed and farmers harvested food, but the food supply was insufficient, resulting in people being unable to buy necessities. This situation reflected Wu Zetian's ideology of "taking agriculture as the foundation". Wu Zetian was a famous female emperor in Chinese history. She advocated agriculture and attached great importance to agriculture. She implemented a policy of "taking agriculture as the foundation" and encouraged farmers to reclaim land to improve agricultural productivity to meet the people's food needs. This ideology also reflected her governing philosophy, which was to attach importance to the people's livelihood and ensure the people's production and life.