Our source for this text is Mao Zedong junshi wenji, Vol. 1, pp. 464–65.

The Principle Governing the Location
of the Encampment of Both Army Groups Is
That It Should Be Favorable for Striking
the Advancing Enemy

(February 28, 1936, 6:00 P.M.)

Lin [Biao] and Nie [Rongzhen], Xu [Haidong] and Cheng [Zihua]:

1. Since the enemy has retreated to Zhongyang, our two army groups are to
concentrate forces and rest in the areas to the south, north, and east of
Guanshang, wait for the enemy to advance farther, and then eliminate him.
2. The principle governing the location of the encampment of the two army
groups is that it should be favorable for striking the enemy advancing from
Zhongyang to Guanshang, or the enemy advancing from Fujiata to
Pushanzhuang, and favorable for striking the enemy advancing from Damaijiao
to Shuitou. Lin and Nie are to draw the necessary distinctions.
3. Troops are to be sent to the five roads toward Damaijiao, Xiaoyi,
Zhongyang, Fujiata, and Liuyu to conduct guerrilla reconnaissance.
4. The cavalry company that the Fifteenth Army Group left in Shuitou should
conduct daily guerrilla missions toward Damaijiao; reconnoitering is also necessary in the direction of Shikou.

Peng [Dehuai] Mao [Zedong]