This paper classifies mines with mining rights into constructing mine, producing mine and residual mine. Mining right assessment on constructing mines is focused on recoverable reserve and investment validation, and that on producing mines is on remaining recoverable reserve and depreciation validation on gallery and ground construction, and that on residual mines is on reserve balance, remaining recoverable reserve, new resource estimation, and depreciation on gallery and ground construction. The residual mines deserve investment, including those ore remained which are difficult in mining and processing, of potential in finding new resources located in favorable mineralization zones. The overseas investment bears risks in exchange ratio, reserve, security and costs, which need serious evaluation before investing.

Saving energy is a great tool against energy crisis. Farmers are a major force to save and economize the energy, especial the rural ladies who play a key role in saving energy. This paper, based on a survey of rural ladies in Zhejiang province, analyzes the awareness of saving energy from persons, communities and society, and presents some suggestions.