surface or horizontal line used as a reference point for measurements

A body of laws enacted to protect workers' rights and interests by setting minimum standards for labor conditions, including contracts, wages, working hours, and benefits; commonly abbreviated as [[劳基法|勞基法|lao2 ji1 fa3]].

A soldier used as a guide during military drills or parades to mark boundaries and help others regulate their speed and direction; also called [[标兵|標兵|biao1 bing1]].

a reference point or set of coordinates used as a basis for calculating geodetic positions such as longitude and latitude