Scottish First Minister Alex Salmond addresses a news conference, calling for support of Scotland's independence, in Edingburgh, Britain, on Sept. 11, 2014. Scotland will hold an independence referendum on Sept. 18. (Xinhua/Guo Chunju)

Two men show signs of supporting Scotland's independence, in Edingburgh, Britain, Sept. 10, 2014. Scotland will hold an independence referendum on Sept. 18. (Xinhua/Guo Chunju)

A woman looks at a sign of supporting Scotland's independence, in Edingburgh, Britain, Sept. 10, 2014. Scotland will hold an independence referendum on Sept. 18. (Xinhua/Guo Chunju)

Scottish First Minister Alex Salmond addresses a news conference, calling for support of Scotland's independence, in Edingburgh, Britain, on Sept. 11, 2014. Scotland will hold an independence referendum on Sept. 18. (Xinhua/Guo Chunju)

A dog wears a waistcoat with Scottish flag, implying that its owner supports Scotland's independence, in Edingburgh, Britain, Sept. 10, 2014. Scotland will hold an independence referendum on Sept. 18. (Xinhua/Guo Chunju)

A dog wears a waistcoat with Scottish flag, implying that its owner supports Scotland's independence, in Edingburgh, Britain, Sept. 10, 2014. Scotland will hold an independence referendum on Sept. 18. (Xinhua/Guo Chunju)