Excuse me, teachers: Is it taboo to write calligraphy works with pen and ink in modern calligraphy creation and special events?

There should be taboos. First, in the past, only emperors could write in red, which was called Zhu Pi. It was a sin for others to write in red to deceive the monarch. Secondly, in the past, when a judge decided a case, the guilty person pleaded guilty and signed it with a red pen. On the case files and notices after being sentenced to death, the names of those sentenced to death should be marked with the Red Cross. Therefore, Zhu Mo is generally not used in calligraphy.