Cultivation has now expanded to the surrounding region Xingtai, Shijiazhuang, Cangzhou, Langfang, Shandong Province and the more than 10 cities and counties, to reach 30 million mu of cultivated area.

• 种植区域现已扩展到周边邢台、石家庄、沧州、廊坊及山东省的10多个市县，种植面积达到30万亩。