China"s yuan strengthened to a two-week high against the dollar on Tuesday and looked set to notch a fourth straight monthly gain, underpinned by persistent corporate demand and signs of liquidity tightness in the money markets. Register for FREE to continue using Reuters.com Free registration gives you access to: Unmatched, global, round-the-clock news Hand-picked insights that are easy to find and use Our Daily Briefing newsletter, delivering the day"s headlines right to your inbox Already registered? Sign in