One of the reforms allows the local education department to choose their own textbooks based upon the national teaching guideline. 其许教教指选择合适自身教材。
Please see the guideline here. 请见规。
Here's a simple cropping guideline. 简单裁剪。
guideline [ noun ]
a light line that is used in lettering to help align the letters
<noun.communication>
a detailed plan or explanation to guide you in setting standards or determining a course of action
<noun.cognition> the president said he had a road map for normalizing relations with Vietnam
a rule or principle that provides guidance to appropriate behavior
<noun.cognition>
guideline \guideline\ n. hypen is changed from WN: adjust hier. a formal rule describing how a situation must be handled; -- used as a direction to administrators from superiors.