Autumn’s Cicada is a sequel of sorts (or the second part) to Sparrow. They may not be related but they will have a similar vibe and premises so we can categorise them as “related” of sorts.
https://www.avirtualvoyage.net/2017/06/ren-jia-lun-and-ying-er-in-spy-drama-qiu-chan-autumn-cicada.html
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