The concert's fourth song "η" indeed made many people shiver. The evaluation committee needed a lot more time for discussion than previously.
Great-grandfather Fang was a little worried. He didn't understand all these music technicalities. He hadn't been able to determine with his listening ability and just felt strange from his rising goosebumps. However, this was all secondary. He was worried that the evaluation committee's grading for this song wouldn't be ideal.
The evaluation results would only be announced after the concert ended. It was impossible to know the detailed scoring for each song right now. Apparently, every song had a number of different evaluation criteria.