由衰老恢复青春。形容老年人充满了活力。
汉·史游《急就篇》长乐无极老复丁。”《旧唐书·宦官书》可愈痿弱重膇之疾，复能返老还童。”
～容易得，超凡入圣路非遥。★明·吴承恩《西游记》第一百五回
Learn the next connected idiom: 返老还童 (fǎn lǎo huán tóng) → 童叟无欺 (tóng sǒu wú qī)
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