From Wikipedia:

Crazy English is a brand name related to an non-traditional method of learning English in mainland China conceived by  Li Yang. Li believes that the traditional way of learning English in China is ineffective. Li Yang's method places heavy emphasis on practicing English orally. His method can be described with the quote "To shout out loud, you learn." Students practise his technique by going behind buildings or on rooftops and shouting English. They also go to his rallies and shout together; this helps them overcome their shyness (everybody is doing it, so nobody is embarrassed). In many ways it remains similar to the traditional pedagogic practices of Chinese education in that it still relies on repetition and recitation; its main plus point appears to be that it encourages learners to overcome the public embarrassment of speaking English in public and potentially making a mistake- this is closely linked to the concept of 'face' in China.  This video shows a Crazy English 'class'.