Reporter :

A recently-aired North Korean documentary has raised speculation that relations between Beijing and Pyongyang have frozen up again after the North's claims of a hydrogen bomb test.Over the weekend, North Korea's state-run Central News TV broadcast a documentary on the military parade that took place in October last year to mark the 70th anniversary of its ruling Workers' Party.What was noticeable was that a high-ranking Chinese official was nowhere to be seen in the film.Liu Yunshan, a member of the Standing Committee of the Chinese Communist Party was standing alongside North Korean leader Kim Jong-un during the parade showing close ties between the two countries at the time.However, none of that scene was shown in the documentary, leading experts to believe North Korea intentionally deleted the footage.