I have studied German in university for four years, and I can reach the level of Telford B2. Defu B2 is a Grade 4 German major. Even a little higher than the fourth grade of German, college German teaching is a four-year course. It's very intense, and it's not less than 5 hours of continuous study every day, and it's taught by a special person in an appropriate way for half a year. If it is purely self-study and there is no guidance, this understanding ranges from eight months to several years. B2 is roughly equivalent to Grade 8 of German major in domestic universities. Most people have to finish this course for four years before they can take this exam. The level of B2 described by Germany is to be able to use German independently to cope with daily work and life. In fact, there are not many undergraduates who have just graduated from German major in China who can meet this requirement.