The score line of the single county No.1 middle school is 700 points. According to the query of official website in Shanxian No.1 Middle School, it is known that the score in Shanxian No.1 Middle School is above 700, the score in Experiment No.1 Middle School is above 6 10, the score in No.3 Middle School is above 600, and the score in Shanxian No.2 Middle School is 450-500. Single-county senior high school entrance examination volunteers fill in batches, and all batches adopt the method of "reporting one batch, recording one batch and clearing one batch", that is, after the current batch starts, candidates cannot fill in the previous batch of volunteer schools again. Therefore, the score of the single county no.1 middle school is 700 points.