Micro Yuan’er - Beijing, China Cha’er Hutong is a quiet spot one kilometre from Tiananmen Square in the city centre. Number 8 in this neighbourhood, located near a major mosque, is a typical da-za-yuan (big-messy-courtyard) once occupied by over a dozen families. In concert with the families, a nine-metre-square children’s library built of plywood was inserted underneath the pitched roof of an existing building.