This is a mosalla or place for salat not an actual masjid but because most of the people in this hotel are muslims they pray the 5 prayers.
also hotel phone number is 0579-85106333 or the one list above
金华市义乌市稠州中路70号, Chouzhou Road, Yiwu City, Jinhua, No. 70
close to major intersection of Chouzhou Rd, North and Yidong Rd. Second intersection on Choushou Rd turn right on Hu Jiang Lou, hotel should be on the right side also