入学典礼 (rù xué diǎn lǐ) means “entrance ceremony”

More examples

学校为新生举行入学典礼。xué xiào wèi xīn shēng jǔ xíng rù xué dián lǐ

The school holds an entrance ceremony for new students.

A formal school welcome that marks a new student's first step into school life.

开学典礼kāi xué dián lǐ: A ceremony for the whole school that celebrates the beginning of a new semester.

学校为新生正式进入学校学习而举行的仪式xué xiào wèi xīn shēng zhèng shì jìn rù xué xiào xué xí ér jǔ xíng de yí shì

入学 (rùxué, "begin school") joins 典礼 (diǎnlǐ, "formal ceremony") to name the official welcome for students starting at a school.

The event is for a group of newcomers, so it is different from a private meeting with one student or a normal lesson.