Failed to set unicode character as target of text objects.

[calon]

Tried to set unicode character “（%u201c） and ”（%u201d） as quote targets.

autocmd User targets#mappings#user call targets#mappings#extend({
\ 'q': {'pair': [{'o': '%u201c', 'c': '%u201d'}]},
\ })

But it does'nt work.
When placing cursor between a pair of these quotes, after excuting command like "viq", some characters were deleted, but not visually selected.