HONG KONG, Dec 12 (Reuters) - Google has refused to change its search results to display China's national anthem, rather than a protest song, when users search for Hong Kong's national anthem, the city's security chief said on Monday, expressing "great regret" at the decision. The row comes after Hong Kong police said they would investigate the playing of "Glory to Hong Kong" - the unofficial anthem of Hong Kong's 2019 pro-democracy protests, at the men's final of a sevens rugby tournament in South Korea in November. The top search term on Google for Hong Kong's anthem is "Glory to Hong Kong". "We've approached Google to request that they put the correct national anthem at the top of their search results, but unfortunately Google refused." "We felt great regret and this has hurt the feelings of Hong Kong people," Tang added.

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