Sign ” of contract of “ yin and yang, the circumstance that leads to the trouble between house-owner and tenement and dispute happens from time to tome. It is tenement presses ” of “ in relief contract to fulfill only sometimes, do not admit the existence of ” of “ shade contract; It is house-owner uses ” of “ shade contract sometimes cannot “ sees smooth ” , and mix ceaselessly charge of collection of ground of tenement concoct various pretexts. Accordingly, should special remind everybody, hire a room to had better seek normal intermediary company, cannot have an insatiable desire for petty gain.