 Sites and patients Doctors from eight hospitals attended the kick-off meeting held in Courtyard Marriott, Hangzhou, March 19th, 2016, and discussed the research protocol and details. The amended research protocol was passed according to revised discussion results and the agreement of all participating units. The methods of blood pressure measurement and the apparatus used are unified. All hospitals will adopt similar non-invasive blood pressure monitoring method and unified monitoring frequency to observe whether the blood pressure is controlled within the target range in two groups. Likewise, the blood pressure target after discharge was maintained at the same levels. 