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China has a large population of elderly in rural areas. Village doctors are acting as health-care gatekeepers for the rural elderly in China and are encouraged to provide more long-term care for patients with chronic diseases such as atrial fibrillation (AF). The data of AF registries from the rural elderly are limited. The present registry aims to provide contemporary data on the current AF-related health status of the rural elderly and the gaps in management of AF by village doctors. This study has two phases. The first phase is a cross-sectional study of AF screening in two rural towns of eastern China. All the residents aged ≥ 65 years are eligible and will be invited to attend a government-led health examination or an in-house AF screening program. The AF detection rate, the awareness of AF and the usage of oral anticoagulants and smartphones by AF patients, and the ability to diagnose and manage AF by village doctors will be assessed. Participants with AF detected in the first phase are eligible for the second phase. A variety of modes of intensified education will be provided to all AF patients and their family members to enrich their AF-related knowledge. Their village doctors will be offered a lecture-based training program focusing on Atrial fibrillation Better Care (ABC) pathway. Follow-up will be conducted for 1 year. The primary endpoint is the composite of all stroke and all-cause mortality. The first phase of AF screening was conducted between April 2019 and June 2019, and 18,712 participants with the mean age of 73.1± 5.8 years were enrolled. The second phase that includes 810 patients with AF, started on 1 May 2019. This study will provide a perspective of primary care system and would indirectly reflect the current status of chronic disease care in rural China. [ABSTRACT FROM AUTHOR]

The purpose of the work is to design a novel impedance adapter to set up a mono‐cone standard field generation system with a large clear time and a large dynamic range. To transform the impedance from 50 Ω (the output impedance of the signal generator) to 75 Ω (the input impedance of the cone), the gradient structures with 11 sections are designed for the impedance adapter. The measured VSWR of the system is below 1.5 from 300 to 2.25 GHz. The insertion loss of the designed is about −35 dB. The system with the designed impedance adapter works well. This is validated by the results of the standard open‐air test site in National Institute of Metrology, China. [ABSTRACT FROM AUTHOR]