FACTS · 《安檢口的夜班》 Night Shift at Lane 3

Every rule shown on screen, its source and the quoted wording. Fetched 2026-10-24. The lane is an international departures lane: the 100 mL rule quoted below is the one for international and regional flights (on domestic flights in China liquids may not be carried in the cabin at all, except toiletries in containers of 100 mL or less).

1. Power banks: 100 Wh / 160 Wh

On screen: label photo 20000mAh 3.7V 74Wh; formula 20000 mAh ÷ 1000 × 3.7 V = 74 Wh; gauge zones ≤100 Wh 隨身帶 (cabin bag), 100–160 Wh 航司批准 · 每人限 2 塊 (airline approval · max 2 per person), >160 Wh 禁止 (banned); verdict 可以隨身帶 · ≤ 100 Wh · CABIN BAG, NO APPROVAL.

• Source: CAAC, 《關於民航旅客攜帶"充電寶"乘機規定的公告》 (Notice on the rules for air passengers carrying power banks), 2014-08-07, listed as 有效 (in force). https://www.caac.gov.cn/XXGK/XXGK/TZTG/201511/t20151105_11173.html

  二、充電寶只能在手提行李中攜帶或隨身攜帶，嚴禁在托運行李中攜帶。 [2. Power banks may only be carried in hand luggage or on the person; carrying them in checked baggage is strictly prohibited.] 三、充電寶額定能量不超過100Wh,無需航空公司批准；額定能量超過100Wh但不超過160Wh，經航空公司批准後方可攜帶，但每名旅客不得攜帶超過兩個充電寶。 [3. Power banks with a rated energy of no more than 100 Wh need no airline approval; those above 100 Wh but no more than 160 Wh may be carried only with airline approval, and no passenger may carry more than two power banks.] 四、嚴禁攜帶額定能量超過160Wh的充電寶；…… [4. Power banks with a rated energy above 160 Wh are strictly prohibited; …] 附：充電寶額定能量的判定方法 …… Wh= V x Ah …… 如果充電寶上只標記有毫安時(mAh)，可將該數值除以1000得到安培小時(Ah)。 [Appendix: how to determine a power bank's rated energy … Wh = V x Ah … If a power bank is marked only in milliampere-hours (mAh), divide the value by 1000 to get ampere-hours (Ah).]

• Same rule restated: CAAC 《航空旅行常識》 (Air travel basics), section 行李運輸 (baggage), 2023-03-16. https://www.caac.gov.cn/INDEX/HLFW/HKLXCS/202303/t20230316_217597.html

  便攜式電子設備中的鋰電池、備用鋰電池（含充電寶）的額定能量不超過100Wh時，可以隨身攜帶，但禁止作為行李託運；如果大於100Wh，但不超過160Wh（含）時，需經航空公司批准後，方可運輸，僅可隨身攜帶且每人限帶2塊。 [When the rated energy of lithium batteries in portable electronic devices and spare lithium batteries (including power banks) is no more than 100 Wh, they may be carried on the person but not checked in as baggage; above 100 Wh but no more than 160 Wh (inclusive), they may be transported only with airline approval, only as carry-on, and at most 2 per person.]

• Check: 20000 mAh ÷ 1000 = 20 Ah; 20 Ah × 3.7 V = 74 Wh ≤ 100 Wh. The label values are invented for a generic, unbranded power bank.
• Not shown: since 2025-06-28 power banks without a CCC (3C) mark or from recalled batches may not be carried on domestic flights (CAAC news, https://www.caac.gov.cn/XWZX/MHYW/202506/t20250626_227805.html). Our lane is international, so the film does not use it.

2. Liquids: 100 mL per container (international flights)

On screen: measurement 21 cm, Ø 6.5 cm, 容器約 500 mL (container about 500 mL); rule 國際航班：單個容器 ≤ 100 mL / INTERNATIONAL: EACH CONTAINER ≤ 100 mL; a 100 mL container outline drawn to scale; verdict 不能隨身帶 · OVER 100 mL · NOT IN CABIN BAG; the bottle is taken out and the bag rescanned.

• Source: CAAC 《航空旅行常識》 (Air travel basics), 2023-03-16 (URL above).

  2.旅客乘坐國際、地區航班時，液態物品應當盛放在單體容器容積不超過100mL的容器內隨身攜帶，且盛放液態物品的容器應置於最大容積不超過1L、可重新封口的透明塑料袋中，每名旅客每次僅允許攜帶一個透明塑料袋，超出部分應作為行李託運。 [2. On international and regional flights, liquids carried on the person must be in containers of no more than 100 mL each, placed in a resealable clear plastic bag of no more than 1 L; each passenger may carry only one clear plastic bag per trip, and anything beyond that must be checked in as baggage.] 注意事項 1.……指的是盛放化妝品的容器的大小不得超過100毫升，而不是指容器內的物質的多少。 [Notes 1. … means that the container holding the cosmetics may not be larger than 100 mL, not how much is inside the container.]

• Original notice: 《中國民航總局關於限制攜帶液態物品乘坐民航飛機的公告》 (CAAC notice on restricting liquids carried on civil aircraft), 2007-03-17, listed as 有效 (in force). http://www.caac.gov.cn/XXGK/XXGK/ZFGW/201601/t20160122_27549.html

  二、乘坐從中國境內機場始發的國際、地區航班的旅客，其攜帶的液態物品每件容積不得超過100毫升（ml）。 [2. Passengers on international and regional flights departing from airports in China may carry liquids only in containers of no more than 100 millilitres (ml) each.]

• Domestic flights (why the lane is international): 《關於禁止旅客隨身攜帶液態物品乘坐國內航班的公告》 (Notice prohibiting passengers from carrying liquids on domestic flights), 2008-03-14, http://www.caac.gov.cn/XWZX/MHYW/200803/t20080318_11842.html

  一、乘坐國內航班的旅客一律禁止隨身攜帶液態物品，但可辦理交運…… [1. Passengers on domestic flights may not carry liquids on their person at all, but may check them in …]

• The verdict concerns the container (500 mL), which is what the rule measures. 500 mL is the bottle's nominal size; the screen reads it as an estimate (約 "about", ≈) from the measured size.

3. Live hairy crabs in a cabin bag

On screen: 活蟹 × 6 · 已捆紮 / LIVE CRABS × 6 · TIED; rule 活體海鮮不能隨身帶進客艙 / LIVE SEAFOOD MAY NOT GO IN CABIN BAGS; verdict 不能帶進客艙 / NOT ALLOWED IN THE CABIN.

• 中國民航網 (CAAC's news site, published by 中國民航報社, the CAAC newspaper), 《白雲安檢提醒您：大閘蟹不能隨身攜帶登機》 (Baiyun airport security reminds you: hairy crabs may not be carried on board), 2019-10-09. http://caacnews.com.cn/1/5/201910/t20191009_1282548.html

  1.海鮮等活體動物不能作為旅客的隨身行李帶進客艙，必須辦理行李託運手續。 [1. Seafood and other live animals may not be carried into the cabin as passengers' carry-on baggage; they must be checked in.] 另外，各航空公司對海鮮的運輸規定標準不一，具體規定請廣大旅客朋友在出行前與航空公司聯繫。 [Also, airlines' rules for carrying seafood differ; passengers should contact their airline for the specific rules before travelling.]

• China Eastern (Wuhan), quoted by 極目新聞 (Jimu News), 2022-11-08: https://www.ctdsb.net/c1666_202211/1560563.html

  大閘蟹和海鮮等屬於鮮活易腐物品，易汙染飛機貨艙，所以禁止作為隨身行李攜帶上機。大閘蟹可以進行託運…… [Hairy crabs and seafood are fresh, live and perishable goods that easily contaminate the aircraft hold, so they are prohibited as carry-on baggage. Hairy crabs can be checked in …]

• Airline rules differ only on checked transport (some airlines take crabs as checked baggage, some don't; 中國經濟網 (China Economic Net) 2017 lists airlines without ventilated holds). None of the sources allows them in the cabin, and an international destination may refuse live crabs altogether, so the film says only "not in the cabin" and does not tell the passenger to check them in.

4. Dual-energy colours

On screen legend: 有機物 organic Zeff < 10 orange; 混合物 mixed / inorganic Zeff 10–18 green; 金屬 metal Zeff > 18 blue; 穿不透 impenetrable black. This is the common convention of dual-energy baggage X-ray (orange organic, green mixed/light inorganic, blue metal, black where nothing gets through); the Zeff bands are the usual approximate ranges, shown as a generic legend, not a specific manufacturer's.

Invented for the film

The lane, the times, the counter (1,284 bags, 37 opened, 412 power banks, 29 liquids, 6 crabs), the bag contents and the console are fictional. No real company, product or logo appears.

Voice-over lines that state a fact

All rules were checked against the sources above on 2026-10-24. Screening rules change and differ between airlines; check the current wording before reusing them.