A Chinese bank employee counts 100-yuan notes and U.S. dollar bills at a bank counter in Nantong in China's eastern Jiangsu province on August 6, 2019.

The dollar hit a four-month high against the euro on Monday as concerns about the coronavirus boosted demand for safe havens, while a bullish outlook for the U.S. economy and weak data in the eurozone made the greenback relatively more attractive than the single currency.

People across China trickled back to work on Monday after an extended Lunar New Year holiday as the government eased restrictions imposed to counter the coronavirus, but the World Health Organization said the number of cases outside China could be just "the tip of the iceberg."