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Cai Yu, 31, was studying at the King's English language school in the CTV building when the earthquake struck.
Cai Yu, a nurse from China, was due to complete her studies there in April.
Her family told the Oriental Morning Post shortly after the earthquake that they had not heard from her.
"We usually chat on web-cam and the last time we talked was last weekend," her sister, Cai Hun, said. "But now we've lost contact."
