Three Kingdoms: Advise Lu Bu to Capture Jingzhou at the Beginning

Chen An accidentally traveled through the Three Kingdoms and became Lu Bu's military advisor. What! Xuzhou can't stay any longer. OK, let's go to Jingzhou. Jingzhou controls Han and Mian in the north, controls the South China Sea, connects Wuhui in the east, and connects Ba and Shu in the west. This is a country that uses military force, but its master cannot defend it. This country is almost destined to have a general. How can the general care? Lu Bu: Then what should I do? Chen An: My lord is in charge of the rear!