It takes a long time for schools to sign red stripes, which will be signed in several batches, from the end of February to the beginning of May. At the stage of signing "red stripes", a student can sign contracts with several high schools. As long as you are good enough, you can choose any of these high schools, and the school is not binding on you.
Red bar: an independent enrollment agreement signed before the middle school entrance examination. The preferential condition of the agreement is that as long as the results of the senior high school entrance examination reach the distribution line of senior high school, they can be included in the key classes of the school.