As of March 1, the first indoor air quality standard of China has begun to put into effect formally. This is the State Bureau of Quality and Technical Supervision, and Inspection and Quarantine, SEPA and the Ministry of Public Health to draft it. Two characteristics are for this standard. One is to meet with the international one and the second is to control overall the index. Since then residents have the "measure" to measure the air quality of the houses especially for unqualified domestic modeling...