What Zhuge Liang called the land of abundance was

In the thirty-eighth chapter of Romance of the Three Kingdoms, Zhuge Liang mentioned when planning for Liu Bei: "Yizhou is a dangerous place, with thousands of miles of fertile land, and it is a land of abundance." Yizhou is a rich land with dangerous terrain and fertile land, which is a good place to establish imperial industry. So Zhuge Liang praised Yizhou as a land of abundance. Zhuge Liang was born in Wolong, yinan county, Xuzhou. Outstanding statesman, strategist, essayist, calligrapher and inventor in the Three Kingdoms period. In his early years, he went to Jingzhou with his uncle Zhuge Xuan. After Zhuge Xuan's death, Zhuge Liang cultivated in Longzhong. Later, Liu Bei attached himself to Jingzhou Liu Biao and visited Zhuge Liang in the thatched cottage. Zhuge Liang proposed Longzhong's occupation of Jingzhou.