1 Concerts can generally be attended except the concert in Ershadao Concert Hall, including Shahe Campus and University Town Campus. You can't enter unless there are some special circumstances, because some concert schools will invoice each class. But usually you can go in later.
Generally, there are notices in the main passages, canteens, entrance points and piano rooms of schools.
Same as 1, except for Ersha Island concert, which is generally free of charge.
Don't let me down after playing so much.