Introduces the project manager responsibility system and risk mortgage management model in Jigang and puts forward improving suggestion for the future.

Adopting matrix management and the check pattern of risk mortgage,purchasing by the way of invitation for bid without base number of a tender,through optimizing design and construction plans,exploring the investing and financing ways and enhancing the process control of constructing quality and so on,the project investment is saved and the engineering schedule and the quality objects are assured.

A study on price stochastic volatility of real estate and value at risk of mortgage loan;