Can high school students buy discounted tickets just using their ID card? Can they not use their student IDs instead?

According to the regulations of most transportation companies, high school students in China typically need to present both their student ID (学生证) and national identification card (身份证) to purchase discounted tickets. While some companies may offer concessions for teenagers with only a national identification card, it is generally not possible to buy reduced-fare tickets solely based on an identity card without presenting a valid student ID.

However, this policy might vary depending on the specific transportation company or travel route. If you are unsure about the requirements for your desired mode of transport, I recommend checking with the relevant authorities or conducting further research before attempting to purchase discounted tickets.