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Revenues - Summary of Revenues (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)
Disaggregation of Revenue [Line Items]
Revenues	¥ 44,317	$ 6,425	¥ 56,807	¥ 180,093
Products air mobility solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	38,061	5,519	46,854	105,351
Products smart city management solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,133	309	7,135	8,282
Products aerial media solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	125	18	518	62,241
Products others [Member]
Disaggregation of Revenue [Line Items]
Revenues	456	66	416	186
Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	40,775	5,912	54,923	176,060
Air mobility solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,326	337	1,302	618
Services aerial media solutions [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,216	176	582	3,415
Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	¥ 3,542	$ 513	¥ 1,884	¥ 4,033

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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