http://www.bbc.com/news/uk-politics-34925962
After referring to the UK's relationship with the Chinese government, Mr McDonnell said: "To assist Comrade Osborne about dealing with his new-found comrades, I have brought him along Mao's Little Red Book."
After Speaker John Bercow intervened to calm the Conservative benches, the shadow chancellor read a quote from the book: "We must learn to do economic work from all who know how. No matter who they are, we must esteem them as teachers, learning from them respectfully and conscientiously. But we must not pretend to know what we do not know".
Throwing the book across the Commons table towards Mr Osborne, he added: "I thought it would come in handy for you in your new relationship."
Picking it up, the chancellor said it was Mr McDonnell's "personal signed copy".
