《史记·十二本纪·夏本纪》
现在遍地长满竹林，到处尽见美盛的芳草、高大苍翠的乔木。这里的土壤湿润，田地列在第九等，赋税则为第七等，有时可以居第六等。
竹箭既布。其草惟夭，其木惟乔，其土涂泥。田下下，赋下上上杂。
At present, bamboo forests dominate the area, and wherever you look you will find luxuriant vegetation, tall trees, and abundant shade. The soil is moist, and the farmlands are ninth-rate, but taxes are seventh-rate, and occasionally may be as low as sixth-rate.