Do you get extra points for calligraphy 10 in the senior high school entrance examination?

No extra points. According to the inquiry, official website, the government of People's Republic of China (PRC) Ministry of Education, learned that the calligraphy grade certificate didn't get extra points. Hard pen and brush grade certificates are collectively referred to as calligraphy grade certificates, with 1-3 for primary, 4-7 for intermediate and 8- 10 for advanced. Calligraphy grade certificate is not listed as a plus item for senior high school entrance examination.