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City wall is an important symbol of ancient Chinese cities with unique geographical and cultural characteristics. Thus, the preservation of this historic landmark is considered significantly important. However, numerous residential construction activities and changes in ecological environment have destructed a great portion of the city walls in recent years. This study looks into the preservation of the ancient city walls from the systematic perspective and in line with the actual characteristics of Longdong Region to provide guideline measures for the protection and restoration of such landmark. Cognition and preservation are adopted extensively to investigate the specific situation of and the factors that influence the ancient city walls in this region. Preservation strategies for the city walls, including the “Axis-Point” system, planning control, and authenticity readability, are presented. The ancient city walls in Longdong Region can be preserved by protecting the entire region, the city, and the main wall body. The systematic method and preservation strategies at the “macro perspective,” “medium perspective” and “micro perspective” levels can solve the preservation problems of the ancient city walls in Longdong Region effectively.

Though enormous research studies were conducted on corporate environmental responsibility (CER), few of them could empirically justify how CER helps to improve firm’s competitive advantage and firms are still hesitant to incorporate CER with their business strategy at present. The purpose of this paper is to theoretically and empirically explore how the CER strategy could help the firm to gain competitive advantage in Chinese context, particularly in terms of achieving brand sustainability (BS).

In this study, 310 listed companies in China were chosen as research sample. First, the CER strategies were classified into developing eco-friendly products, adopting EMAS or other eco-management, enhancing the impact of CER through value chain and charitable CER. Second, BS is constructed as two dimensions, i.e. resource-acquisition and consumer impact. Accordingly, this paper analyzed the relationship between CER and BS with regression model analysis, taking account of several moderating and control variables.

The results indicate that CER strategies have positive effect on BS. Among all CER strategies, developing eco-friendly products and charitable CER undertakings are the most effective ones to promote BS performance. Also, the paper found that the length of time in adopting CER strategy moderates the effect of CER on BS. The empirical evidence proves that CER strategies could enhance the brand value in terms of BS and help the company to gain competitive advantage.

First, most of our samples are of the state-owned enterprises, so our assumption might not be applicable to other types of business. Second, corporate social responsibility (CSR) communication is an important factor in the relation between CSR and corporate performance, but it is not taken into account in this study. Third, the difference in industries and ownership in this research is out of concern.

As this paper has provided empirical evidence to reveal the effectiveness of different CER strategies, firms in China could be more motivated to undertake CER not only for the sake of environment but also for their brand value and competitive advantage. More importantly, this paper could be a valuable reference for the firms in China to choose suitable and effective CER strategies, as proved in this study, to gain competitive advantage in the market.

At first, while public environmental awareness has improved gradually, we introduce the BS concept to explain how the CER strategies affect CCA. This approach gives us another perspective to highlight the relationship between these two constructs. Second, we conducted our research from practical perspective to explore how to apply the CER undertakings as the company’s strategy. Third, we conducted our empirical research in Chinese context, which will enrich the theoretical CER and CSR literature.

This paper aims to elucidate the geochemical characteristics of the hydrothermally altered rocks with gold mineralization and the elemental transfers in hydrothermal alteration hosted in alkaline complex in Hongshan area, Taihang Orogen, North China, and preliminarily discuss the relationship between the gold mineralization and the hydrothermal alteration.

Based on detailed field investigation, sampling and petrographical observation, major oxides and trace elements of nine rock samples are analyzed, and the method of mass balance equation is used in calculation of the elemental transfer.

Three alteration stages in the Hongshan area are identified, which are the early, main and late alterations. The early one is characteristic of extensive pyritization in the complex, which is related to the mantle-derived magmas and occurs before gold mineralization. The main one is characterized by developing a great deal of altered rock in fracture zones with the gain of many elements and the loss of a few elements. The late one is dominated by limonitization, that is limonite replacing the early pyrite or Fe₂O₃ replacing FeO in rocks. In the main alteration, the altered rocks obviously gain fluid component (LOI, i.e. loss on ignition) and elements such as V, As, Rb, Au, La, Ce and Nd and total rare earth elements (REEs). Elements such as K, Fe, Cu, Zn, Y, Mo, Sb, W, Re and U are gained in some altered rocks. Na and Sr are lost in all altered rocks, and Th and Bi are lost in some ones in the meantime. The following elements: Si, Mg, Mn, Ca, Li, Sc, Cr, Co, Ni, Zr, Ag, Ba and Hg show either gain or loss in different altered rocks. Au is notably enriched in the hydrothermal alteration. The elemental gain or loss in the altered rocks indicates that the main mineralization develops extensive de-alkalinization, local potassic metasomatism, silicification or desilicification.

Abundance of cultural resources is a typical feature of traditional villages. It is particularly important to explore the development path of traditional villages from the perspective of cultural resources.

Based on symbiosis theory, establish a symbiotic development mechanism of traditional village characteristic cultural elements and use grey relation analysis (GRA) to evaluate the resource advantages of different cultural attributes. This paper proposes the traditional village development model of different symbiotic units in the county. An empirical study is conducted in conjunction with the national historical and cultural city of Xunxian County, Henan, China.

The results show that (1) according to the different attributes of humanistic cultural resources, artificial cultural resources and natural cultural resources in traditional villages, different symbiotic units can be divided, and advantageous resources can be shared through the symbiotic interface; (2) using GRA to calculate the grey relational degree between cultural resources sequence of different attributes and the sum of cultural resources sequence in the county and define as the active degree of humanistic culture, the inheritance degree of artificial culture and the integrity of natural cultural resources are shown to reflect the status of the inheritance of humanistic cultural resources, the existence of artificial cultural resources, and the protection of natural cultural resources; and (3) a comparative analysis of the active degree, inheritance, and integrity of each symbiotic unit leads to the proposal of three symbiotic models of folklore vitality, characteristic space, and natural ecology, all of which are beneficial to promote the formation of a symbiotic environment.

The main innovation of this paper is to put forward the research scale of symbiosis theory in the field of urban and rural planning at the county level, delimit the symbiosis units of traditional villages at the county level, complete the quantitatively evaluate cultural resources in different symbiotic units with GRA, revealing the symbiotic development mechanism of cultural resources characteristic elements in traditional villages.