Most of what you'll need in Shenzhen only works once you have a Chinese SIM, WeChat and a working payment app — and you can't set those up at 30,000 feet. Do these before you leave home, and the first hour on the ground becomes easy.
Tick each off before you leave. The list is saved in this browser, so you can come back to it. None of it needs to happen at the airport.
Pick the window you're in. The items are the same eight; this just tells you which to do when.
Install the apps (item 1), sort data (2), file the arrival card (5) and run the eligibility check (7). These need Wi-Fi and an app store, so do them at home.
Print the connecting ticket (3), save the hotel address and passport (4) and get cash and check the card (6). Physical things, done the night before.
Screenshot this checklist and the key pages (8), and re-check your passport validity (3+ months) and the onward ticket. Then close the laptop and go.
All run on an overseas app store. None need a Chinese ID to download; a few need a mainland number to fully activate, so do the setup at home where you have Wi-Fi.
Payments, the metro and bus ride code, tax refund, and live menu translation. Bind an overseas card inside the app — it's the one you'll actually scan to pay.
Messaging and mini-programs — iPort, the Shenzhen Guide, transit codes. Register with a phone number; top up Wallet later if you want in-app pay.
Camera translation for menus and signs, plus conversation mode. Download the Chinese offline language pack before you fly.
Navigation. Amap is more accurate for China but Chinese-first; Apple Maps works without a local account and is fine for getting around.
Book free layover tours (Hong Kong, Shanghai) and trains. English interface, overseas card — do it before you arrive, the good slots go fast.
File the arrival card and check visa rules straight from the immigration authority. No Chinese account needed.
Done all eight? You're in the top few percent of prepared transit travellers. Land, follow the first-hour steps, and the city is yours.