The Taiji-1 satellite is a pilot satellite mission of Taiji program, which is used to verify Taiji’s key technology and also to testify the feasibility of Taiji roadmap. Taiji-1 was launched on 31st August 2019 and its designed mission was completed. The results of Taiji-1 first scientific run are briefly introduced. A detailed analysis on how Taiji-1 can bridge the gap between ground experiment and Taiji pathfinder is presented. To report current progresses and achievements on Taiji program made by Taiji scientific collaboration, we publish this special issue with including 26 articles.

中文翻译：

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太极计划试点——从地面到太极二号

太极一号卫星是太极计划的先导卫星任务，用于验证太极关键技术，也验证太极路线图的可行性。太极一号于2019年8月31日发射，设计任务完成。简要介绍了太极一号首次科学运行的成果。详细分析了太极一号如何弥合地面实验和太极探路者之间的鸿沟。为报道太极科学合作在太极计划方面的最新进展和成果，我们出版了本期特刊，共收录 26 篇文章。