Landlord, I tell you that ABC's three grades are the standards of European unified language certification system. German is naturally within the system.
Beginners are A 1, A2 level for 400 hours.
The intermediate level is B 1, and B2 is 800 class hours, among which the requirements of Telford are between B2-C 1.
Advanced is C 1, C2 is 1200 hours,
If you go to Goethe Institute to study German, you will be issued with a certificate of certified hours.
Don't listen to the above DSH, it is out of date. TestDaf is king.