It means less than half an acre of land at home, so you don't have to go out to work. You can farm to support your family, and your family will not go hungry.

Two-thirds of the arable land means that one person or a family owns two-thirds of the land. Two-thirds of these fields are called thin fields because of their poor soil quality or poor geographical environment and conditions. Minute is the unit of measurement for the urban area of China. One acre equals ten, and one minute equals 66.67 square meters. People usually refer to bad and bad land habits as thin fields.