Advantages and disadvantages of chess bridgehead layout

The advantages and disadvantages of the layout of chess bridgehead are introduced as follows:

Advantages: the bridgehead on both sides of the strait is the river boundary. Whoever occupies it will be able to enter, attack and retreat, and defend and defend. Therefore, military strategists will struggle, especially cars, cars in front, guns in the back, and Ma Xiangqian will rush. Classic routine.

Disadvantages: the disadvantage of this layout is that it is easy to be controlled by the other side, thus losing the opportunity to attack and defend.