Question: What typhoon struck China in 2012 approached within 800 km of Hong Kong and posed a threat of deteriorating conditions in Hong Kong?
Sentence (from "Typhoon Vicente"): Typhoon Vicente, known in the Philippines as Tropical Depression Ferdie, was regarded as the most powerful storm to strike southern China in recent years, as it made landfall as a powerful category 4 equivalent-typhoon.
Relevant evidence: Yes