In November 2018, CEPC CDR was announced and since then, CEPC accelerator entered TDR phase towards its planned completion at the end of 2022. In this paper, we give status review of CEPC optimization design, hardware TDR R&D progresses, CEPC-SppC compatibility relation, civil engineering design, site selection, CIPC and international collaborations, etc. CEPC plan is also presented.

中文翻译：

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CEPC 和 SppC 状态 — 从 CDR 完成到 TDR

2018 年 11 月，CEPC CDR 公布，此后 CEPC 加速器进入 TDR 阶段，计划于 2022 年底完成。本文对 CEPC 优化设计、硬件 TDR 研发进展、CEPC-SppC 兼容性关系进行了回顾。 、土木工程设计、选址、CIPC和国际合作等。还介绍了CEPC计划。