Understanding the influence of COVID-19 on China's agricultural economy and the Chinese government's emergency measures to ease the economic impacts of viral spread can offer urgently-needed lessons while this virus continues to spread across the globe. Thus, this study collected over 750,000 words upon the topic of COVID-19 and agriculture from the largest two media channels in China: WeChat and Sina Weibo, and employed web crawler technology and text mining method to explore the influence of COVID-19 on agricultural economy and mitigation measures in China. The results show that: (1) the impact of COVID-19 on China's agricultural economy at the very first phase is mainly reflected in eight aspects as crop production, agricultural products supply, livestock production, farmers' income and employment, economic crop development, agricultural products sales model, leisure agriculture development, and agricultural products trade. (2) The government's immediate countermeasures include resuming agricultural production and farmers' work, providing financial support, stabilizing agricultural production and products supply, promoting agricultural products sale, providing subsidies, providing agricultural technology guidance and field management, and providing assistance to poor farmers to reduce poverty. (3) The order of government's immediate countermeasures is not all in line with the order of impact aspects, which indicates that more-tailored policies should be implemented to mitigate the strikes of COVID-19 on China's agricultural economy in the future.

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Regional sustainable development is an important focus on natural resources management, and also is a critical requirement for socio-economic system's sustainability. Water resource is one of the most important supports for the sustainable development of society and economy. The study proposed the concept of water resources carrying capacity (WRCC) to assess the scale of economy and population that the local water resources can support. And the study took Tianjin city of China for an example, and its population size and economic scale were chosen as two main indices. Based on the historical statistical datum, the carrying index (CI) and index of water supply-demand balance (IWSD) were evaluated, and then the current WRCC in Tianjin city and its dynamic tendency were evaluated by means of the method of carrying capacity of relative resources (CCRR). The results showed that the utilization of water resources in Tianjin is inefficient for now, the dynamic trend would be partly rational after the protection policy of water resource was put into practice in 2010 and 2020, and the WRCC of Tianjin city went beyond the average WRCC of China and was roughly equal to that of Beijing city. This paper showed that the rational policies and measures should be established and implemented to make sure utilize water resources efficiently in Tianjin city.Keywords Water resources carrying capacity · Carrying capacity of relative water resources · Carrying index · Index of water supply-demand balance · Tianjin City of China

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This study examines the determinants of farmers' willingness to pay (WTP) and their payment levels for ecological compensation of the Poyang Lake Wetland in China. We developed a farmer household survey and gathered 292 effective responses. The contingent valuation method (CVM) and Heckman's two-step model were employed for the empirical study. Results show that 46.58% of farmers are willing to pay ecological compensation, with an average price of $64.39/household per year. The influencing factors that significantly influence farmers' WTP include household income, residential location, emphasis on improvement of wetland resources, arable land area, and contracted water area. In addition, household income, residential location, arable land area, and contracted water area are significantly related to their payment levels. The results of this empirical study inform important policy implications and recommendations.

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