It is unclear why the Chinese government denied the request and Chinese authorities do not provide reasons to Hollywood studios when they disallow screening of their movies, the source said.
President Xi Jinping, 65, was photographed with former US President Barack Obama in 2013, sparking comparisons to AA Milne's much-loved bear and his pal Tigger.
Another photo in 2015, showed Xi in a motorcade next to an image of a Winnie-the-Pooh in a toy vehicle, in what was labelled "China's most censored photo" by political analysis company Global Risk Insights, according to The Hollywood Reporter.
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That's because the "bear with very little brain" has been used to poke fun at all-powerful President Xi in memes spread by Chinese internet users.
Although no official reason has been given for Christopher Robin's banishment from China, which operates a strict quota on foreign film, the ban comes on the heels of "several Pooh crackdowns", says Sky News.
Xi was again compared to the fictional bear in 2014 during a meeting with Japan's Prime Minister, Shinzo Abe, who took on the part of the pessimistic, gloomy donkey, Eeyore.
The only other Disney film this year to receive a no-go from China was sci-fi film "A Wrinkle in Time".
In June, the country started censoring mentions of HBO comedian John Oliver and HBO's website after his show, "Last Week Tonight", ran a segment criticising China and Xi, specifically, for the increasingly authoritarian policies of the Chinese Communist Party, which he leads.