Do I have to have a student ID card to travel to Xi at half price?

I took my sister to the Terracotta Warriors (she 15 years old, went to junior high school, but didn't have a student ID card), so the conductor wouldn't sell half-price tickets. The following are the instructions for purchasing tickets for Terracotta Warriors and Horses for your reference:

1, active servicemen (including armed police) shall present their official and soldier certificates;

2, the disabled with my disability certificate;

3, 65 years old or older (including 65 years old), with my ID card;

4. Students at school should show their student ID cards;

5.1.2m children are free to visit;

6, 70 years old or older (including 70 years old), with my ID card, free to visit;

7. Adult colleges and universities do not enjoy preferential treatment;

8, military workers do not enjoy preferential treatment;

9. Documents without steel seal are invalid;

10, the personnel who enjoy the discount will be released after verification at the ticket gate with valid certificates.