Ever heard of the royal tradition?
The royal tradition is:
After the royal princesses and princes reach a certain age, the king will send them to an academy and complete the orders given.
Yu Yiqian, who was 17 years old, was called back from a distant country by the king and queen.
Inform her of the "royal tradition", which is the task she is asked to complete.
Then she went to Singer Liz College......