China posted the biggest advance among mixed Asian-Pacific markets Wednesday with the Shanghai Composite gaining 2.2%. Investors speculated that surprisingly grim Chinese trade data may bring relaxed government policies to rev up growth. Hong Kong's Hang Seng Index jumped 1.1%. Japan's Nikkei 225 slid 0.4%. Australia's S&P/ASX 200 rose 0.4%. South Korea's Kospi slid 0.3%. India's Sensex was down 0.7%.