规则 (guī zé): rule, regulation; regular

Every game has its own rules, and players must follow them; otherwise, the competition cannot be fair.

The school's rules are strict: students cannot be late for class, nor can they eat in the classroom.

When new employees join, the HR department explains the company's various rules in detail, such as the leave request process and reimbursement standards.

In the library, the rule of keeping quiet is to allow everyone to read with concentration, so cell phones must be set to silent mode.

He just learned to play Chinese chess and is not yet familiar with the rules for moving pieces, so he often makes careless wrong moves.