Building with advancing and invisible design conception and construction way to recall the attractive moment in 100 years ago, in the oldest and ancient quadrangle area in the central of Beijing, The original building is the dangerous one, which increase the difficulty of reinforcing and rebuilding without any trace, meanwhile it’s hard to balance the style of the bar with the privacy and the whole historical neighbor. Architectural space like the words “QUAD” which contain the meaning of centrality and privacy, the modern use function blend in the ancient scene naturally, low key, comfortable and fabulous.