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Nowadays, CDA is widely used in news discourse because it can help people understand the implicit viewpoints in news discourse and grasp the true situation of news reports. As the main form of news discourse, media reporting is good intertextuality for CDA. Therefore, this paper, based on the theory of CDA, tries to discuss the implication of major media reporting about the issue of the China-US trade, from which the genre of media reporting here is also analyzed.

Abstract
Background
Changing water quality was prevalent in the current water supply. The fluctuation of iron stability due to changing water quality followed four characteristics: objectivity, relativity, predictability, and controllability. Therefore, it was necessary to study the stability of iron in the pipe network by integrating different water quality factors.

Results
The iron stability risk evaluation system was established according to the different water quality factors in the drinking water distribution systems (DWDSs). Meanwhile, an improved fuzzy comprehensive evaluation method was established to evaluate the risk of iron. Chloride, sulfate, dissolved organic matter (DOM) and pH were selected as the risk assessment index. The divisions of different evaluation levels were carried out through the values of water quality factor. On the basis of expert scoring, the weight and membership degree of water quality factors were analyzed by structural entropy method. In addition, risk analysis was established by using the optimized risk assessment system. According to the results of the comprehensive evaluation, DOM and pH were identified as two of the most important factors in the evaluation of the iron stability. In addition, compared with the traditional fuzzy comprehensive evaluation method, the optimized method had a higher degree of fit which could more clearly prove the relationship between the risk value and the iron concentration.

Conclusion
The uncertainty between the factors was eliminated by establishment of the fuzzy evaluation method combined with the different effects of water factors on iron stability. The method could be used as a comprehensive evaluation and be beneficial to the analysis of iron risk in water supply network.

Inconsistent online reviews, which affect customers' purchase intention, are gaining increasing attention. In this paper we analyzed the mechanism of inconsistent online reviews that are posted by the same reviewer on customers' purchase intention. Our research was based on a psychological
distance theory perspective, specifically in three dimensions: temporal distance, social distance, and hypothetical distance. Our findings were as follows: First, inconsistent online reviews had a significant negative effect on customers' purchase intention, and product type (experience vs.
search) played a moderating role. Second, when customers faced inconsistent online reviews, temporal, social, and hypothetical distance significantly affected their purchase intention but this differed according to product type. The effect of temporal distance was more significant for a search
product than it was for an experience product; however, social distance and hypothetical distance had more significant effects for the experience product. Our research conclusions enrich the literature on online reviews and provide suggestions for sellers on e-commerce platforms to manage
inconsistent reviews according to product type.