Paris Agreements regarding carbon reduction constraints urges nations to promote developing clean energy up to national strategies. Distributing gas power generation is widely used worldwide thanks to its energy saving and environmental protection. Gas-heating-electricity united projects amount up to 70% with high efficiency, strong peak-adjusting capacity and high environmental benefits, which is a vital means in using gasThis paper analyzes the economic benefits of gas-heating-electricity united projects in 28 provinces based on depreciated cash flow, and presents suggestions on governmental planning and leading, companies’ selecting locality and deceasing investment costs to acquire higher benefits

This paper, based on energy values theory, uses ecological footprint model to quantitatively analyze Qiqihaer's energy ecological carrying capacity, energy ecological footprint and ecological deficit/excess during 2000 to 2016, with results showing that Qiqihaer had been in ecological deficit at a rising tendency, which means human's demands exceed the natural supplies, an unsustainable status. Qiqihaer shows a growing ecological environmental carrying capacity pressure, a diminishing coordinated ecology and eco-environment. The regional ecological coordination is relatively poor. GDP ecological footprint index per 10k RMB indicates an increasing energy use rate, an improved resource use method and a decreasing ecological impact during Qiqihaer's economic development.

Qinshui coalfield as China's largest developed block of CBM resource has been extensively explored and developed, but receives less research in its Yuxi well field. This paper, based on its No.3 coal seam geology, studies its gas and CBM occurrence, and relation among gas content and coal metamorphism, coal thickness, buried thickness, coal bed top and bottom and structure, and applies simulation to forecast ground fractured vertical well gas production and recovery, assesses the ground pumping potential of No.3 coal seam. Results show that the structures are simple with less faults, thick coal seam, medium buried depth, high gas content, good permeability, strong absorbability, and favorable reservoir geology. The well field is a monocline with compact top and bottom, good for gas enrichment. Gas content rises as thickness, buried depth and coal metamorphism increase. It is predicted that the vertical fractured well would have an accumulative gas production up to 410.53×10^4 m^3 in 15 years at a recovery at 60%, and the working face gas content may be lowered below 8 m^3/t. This research offers references for CBM development and gas controls in Yuxi well field.  

This paper classifies China`s 31 provinces in terms of their environmental pollution by means of system clustering and K-mean clustering, and applies variable coefficient model and variable intercept model of panel model to analyze the average energy consumption level and trend based on 24 provinces`coal, coking coal, crude oil, fuel oil, gasoline, kerosene, diesel and gas consumption data of 2006—2011. Results show pollution extent changes after energy consumption trend, but the latter can change the former. Energy consumption trend is negatively related to environmental pollution extent. Regional energy consumption characteristics are connected with its industrial structure and resources abundance. Energy consumption intensity and trend display low in the region with a higher economic level and an intensive industrial structure. Suggestions are presented on environmental protection policies based on energy consumption characteristics.

 According to USGS and some websites data,it generally shows a good status in China’s silver resource development and utilization with silver reserve ranking ahead and production ranking top in the world. China is a big country for silver, but there are issues during silver development and utilization, such as less guarantee in silver resource, irrational silver industrial structure, low metallurgical technology and low recovery rate. China shall optimize industrial policies and structures, carry out a protective mining, raise resources utilization rate and promote a sustainable development.

The global economic downturn trigged by international financial crisis has exerted an impact on the online tourism industry. This industry is now developing slowly. The new vertical search websites, travel agencies, hotels and airlines hamper the development of online tourism industry through direct selling. This paper, based on Industrial Value Chain theory and Porter’s Competition theory of five forces, analyzes the internal and external environments of online tourism industry, evaluates the environmental factors influencing online tourism with a matrix method.

Kaifeng, as an ancient capital with 7 dynasties has notable “Song” culture, is abundant in tourism resources from its long history and brilliant culture, is famous by its “SONG”, “Ancient”, “People” and “Water”. However, the development status does not match with its tourism resources. This paper analyzes the advantages and issues in Kaifeng tourism, finds out the bottle-neck and presents some approaches to tourism development in Kaifeng.