In the center of the space, a fist-sized white ball was floating. It's purpose remained unknown for now, only swaying slightly when the teapot entered, and then it went still again.,The central courtyard is the largest, with the most residents, and it's clearly the most lively.,Having reached the front yard and greeted the "Grandfather of Three" riding his bicycle, Du Fei finally dashed out of Siheyuan.。