The original meal card is the kind of sun card with holes in it. Two years ago, Tsinghua began to implement the "one-card" system, integrating the functions of multiple cards into the student ID card. Now is the transition period, both cards can be used, but the old Sun Card is being eliminated, so now the Sun Card can be recharged at most 100 yuan at a time, which is inconvenient, but it is very convenient for the student ID card to be recharged by itself. But now the temporary meal card is still the kind of sun card.