Can I leave the airport on a layover in Guangzhou?

Eight hours is our floor at Baiyun, and the arithmetic is unforgiving. The transit-exemption counter in the arrivals hall tends to take 40 to 60 minutes, because officers check your onward ticket line by line before they stamp anything. Line 3's northern branch leaves from Airport South (Terminal 1) and Airport North (Terminal 2) and needs roughly 50 minutes to reach Tiyu Xilu, with trains every few minutes from about 06:00. International check-in usually closes 60 minutes before departure, and outbound immigration and security can take another hour when the evening bank of flights to Southeast Asia lines up. Add the ride back, and an eight-hour connection leaves about three hours in the city: one cluster of sights, not two. The carriages run cold enough to raise goosebumps after the 30.2°C October afternoon outside, so keep a layer in your daypack.

We'd spend those three hours in the old Yuexiu streets around Ximenkou. Change at Tiyu Xilu to Line 1 westbound, and Ximenkou is six stops on. Guangxiao Temple is a five-minute walk north, where sandalwood smoke hangs under the bodhi trees and a bell carries across the stone courtyard. Ten minutes east on Liurong Road, the Temple of the Six Banyan Trees rises to its octagonal Flower Pagoda at roughly 57 metres. Huaisheng Mosque on Guangta Road traces its founding to AD 627 and still holds Friday prayers, though non-Muslims should come outside Friday midday with shoulders and knees covered. All three fit inside a flat loop of about 1.5 kilometres.

Food is where a solo layover runs easiest. Cantonese tea houses seat singles without fuss, and one diner can order two or three steamer baskets of har gow and char siu bao instead of a banquet, with a per-person tea charge of a few yuan added to the bill. For dessert, Nanxin on Dishifu Road, at the western end of Shangxiajiu (Changshou Lu station, two stops past Ximenkou on Line 1), serves double-skin milk, a wobbly steamed pudding that tastes of fresh buffalo milk. Shangxiajiu's qilou arcades are loud with phone-accessory stalls, and we find the main drag crowded and commercial, while the side lanes off it hold the better noodle shops. Canton Tower suits a later connection, because its lights come on at dusk and the Zhujiang New Town riverside is well lit and patrolled after dark.

Guangzhou scores 6.5/10 for solo-traveler safety (see the TTDI Solo-Safety Index), and the risks we see are mostly about money, not violence. Unlicensed drivers work the Baiyun arrivals hall, so walk past them to the marked taxi rank, or book through DiDi, which has an English interface. Line 3 is among the most crowded lines in the network from 08:00 to 09:30 and 17:30 to 19:30, so carry your passport in a zipped inner pocket. Strangers near Beijing Road who invite you to a tea tasting are running a known bill scam. Board the airport-bound metro at Tiyu Xilu before 22:30, because after that a metered taxi takes about 45 minutes and costs roughly 130 to 160 yuan with the toll, or about US$19 to US$24 at 6.6862 yuan to the dollar.

Google, WhatsApp and Gmail are blocked in mainland China, so buy a roaming eSIM before you land. Link a foreign Visa or Mastercard to Alipay at home, because most Yuexiu food stalls now expect a QR scan, not a 100-yuan note. Under eight hours, stay inside the terminal. For an overnight connection, the Pullman Guangzhou Baiyun Airport sits across from Terminal 1, and Trip.com's single-occupancy filter tends to show solo rates below the double price. Left-luggage desks in both arrivals halls hold bags by the day, which frees you to walk the Ximenkou loop with a light daypack.