How long has Mr. Toby Lin been studying "regular script improvement" in the zero-based calligraphy live class?

From the Beauty of Calligraphy to the Beauty of Life in 2022 —— The study time of Toby Lin's zero-based calligraphy live class "Improvement of Regular Script" is from June 2022 10 to June 2023 18, with a ***20 class hours, each time 1 hour for 20 minutes. No two classes are the same. On-the-spot teaching, real-time interaction and answering questions can speed up meeting the needs of teaching demonstration and let students see clearly the pens used in each demonstration.