beijing, jan 1 - when south korean student yi da hye came to china in 2004, she could speak a smattering of mandarin but struggled with sentences and could write only a few chinese characters. after five years of drilling for the state-run hanyu shuiping kaoshi (hsk) or ‘chinese proficiency test’ here, the 27-year-old has been certified as an ‘advanced’ student of the language and is sharp ... |