The project required to fit 300 people in a single story workplace of 20Wx80Dx5H (m), and adequate space should be reserve for communal and storage purpose. Upward expansion is not permitted, so it was done first by digging down, then to insert an ultrathin mezzanine to realize the requirements. Main decorative materials bamboo organized in “pieces” and “nets” creates a visually light and thin feeling which relieves repressed feeling. Concrete base plus bamboo materials create a sense of cool and warm, which exactly matched with client's expectation of combining personality plus adaptability.