This paper mainly discusses the relationship between corporate strategy and earnings management by using multiple regression analysis. And the data of A-share listed companies in China from 2007 to 2016 are used. The result shows that the corporate strategy affects the level of earnings management and the choice of earnings management methods.

With the continuous increasing of service-rail-vehicle in China, some defects such as cracks appeared at different stages of service when they had not reached the design life, while current theories and methods cannot explain the appearance of defects, which brought risks and hidden dangers to the operation of the vehicles. It was found that the reasons were mainly caused by one or several factors such as material performances, design, manufacturing process and operating environment. Since more and more sensors being installed on the vehicles to supervise the health of structure, it is more improtant to focus on the performances of materials. Through comparing different material standards including international, national, railway industry and enterprise standards, as well as the technical delivery conditions of other industries, it was recommended that the fracture mechanical parameters such as fracture toughness and fatigue crack growth should be proposed into the materials quality control regulations of original equipment manufacturers (OEMs). Furthermore, based on the testing data of materials from OEMs, several suggestions were proposed on the basic performance of materials such as raising the requirements contained impact, metallography and corrosion resistance properties in order to provide guarantee for the service safety of vehicles.

Stock Price of GREE Electric Appliance, Inc. fell sharply without cash dividends distributed in GREE annual report on April 25, 2018. Based on fee cash flow and surplus free cash flow, this paper presents the evaluation criteria of dividend capability. Using the detailed data of sampled China's listed home appliance companies, free cash flows, surplus free cash flows, and their cumulative values are computed. The capabilities of cash dividends are judged and comparatively analyzed. The results show that white goods companies have the best capabilities of cash dividends. Especially, the GREE's cash dividend capability is investigated based on free cash flow. The results reveal that GREE has good cash dividend capability without diversified development. The forced dividends under CSRC leads to "Ponzi dividends", and discourage from the promotion of core competitiveness and the development of listed companies to a certain extent.

This paper examines correlation between the corporate social responsibility and investment efficiency by selecting 2013-2015 data sample of 43 companies on GEM and using principal component analysis and multiple regression analysis, and corporate governance as an intermediary variables into the research system, the establishment of intermediary effects model to explore the social responsibility, corporate governance, investment efficiency of the mechanism. The result show that corporate social responsibility has positive correlation with investment efficiency, that social responsibility information disclosure the better the quality, the higher the investment efficiency; and improving the corporate governance structure can improve the positive correlation between corporate social responsibility and investment efficiency, and by the concept of social responsibility into corporate governance among, and improve investment efficiency, and enhance corporate value.