In the future according to Xinhua News Agency, there should be " quality guarantee period " too in engineering construction , such as the commodity apartment , office building ,etc., in the course of building, the project contractor must reserve the quality earnest money accounting for 5% of total price of the project . Project produce quality problems within " quality guarantee period ", can deduct quality earnest money go on determine and maintenance. This to spread news that come out in " construction project quality earnest money manage temporary means " from what Ministry of Construction announce recently. The method stipulates , issue the construction project quality earnest money that Bao Fang and contractor reserved certain proportion from the project fund that should pay, by soing as to ensure that the defect that a contractor presents to the construction project in the defect responsibility one carries on maintenance, all or the part use the construction project of governmental investment, will calculate about 5% of total value of proportions and reserve the earnest money according to the project cost. The defect responsibility one is generally 6 months , 12 months or 24 months, in the defect responsibility one, if the defect arising from contractor's reason, the contractor should be responsible for maintenance, and undertake determining and maintenance cost . If contractors do not maintain do not bear the expenses either, can deduct the earnest money to issue to bag people in terms of the contract, and the contractor undertakes the liability for breach of contract.