Yes Chalk is an internet education platform, focusing on vocational education examination services. Its main business is civil service examination, public institution recruitment examination, and many online education products such as teacher recruitment examination, postgraduate entrance examination, accounting, legal examination, architecture, open classes, CET-4 and CET-6. The military and civilian written test mainly includes public subjects and professional subjects. * * * subjects include * * * knowledge and post ability. Chalk has corresponding information, which is detailed and can be studied with chalk.