NEW YORK, June 14 (Reuters) - Options on several U.S.-listed Chinese exchange traded funds have drawn bullish flows in recent days as some traders take advantage of a slump in bullish sentiment on Chinese companies to place contrarian upside bets. The bullish trades occur as investors, who started this year with an upbeat view on China, betting on a strong economic recovery as the world's second-largest economy emerged from pandemic disruptions, have been largely disappointed amid softening economic indicators. Shares of the two largest U.S.-listed Chinese ETFs - the iShares MSCI China ETF (MCHI.O) and the iShares Trust-China Large-Cap ETF...