In the Shenyijing there is a Li Zi’ang, who was seven cun in height (c. 23cm), but could travel a thousand li in a day; one morning he was swallowed by a seagoing swan, and lived in the swan’s belly for three years without dying.
Li Rong 李冗, Du yi zhi, 獨異志 (Outstanding Fantastic Stories), 上1.6 (Tale 42):
Li Rong 李冗, Du yi zhi, 獨異志 (Outstanding Fantastic Stories) in Du yi zhi, Xuanshi Zhi 獨異志，宣室志 (Outstanding Fantastic Stories, Stories from the Chamber of Dissemination), edited by Zhang Yongqin 张永钦 and Hou Zhiming 侯志明 (Beijing: Zhonghua shuju, 1983)
 On the Shenyijing 神異經, compiled by the Han-era scholar Dongfang Shuo 東方朔 (c. 160 – c. 93 BCE), see https://zh.wikipedia.org/wiki/%E7%A5%9E%E7%95%B0%E7%B6%93. The text is available at https://babel.hathitrust.org/cgi/pt?id=keio.10810914646