Beijing, Hong Kong, and Macau. 👍🏻
Travelled from the UK to Beijing, then on to Hong Kong and Macau. On arrival in Beijing, Airalo just worked. Minor hiccup on arrival in Hong Kong, but connecting through WiFi, their support bot knew exactly the problem, and sorted it out in less than a couple of minutes. After that, travelling to Macau was no problem, and the data Airalo suggested I'd need was pretty much exactly right. I'll definitely be a repeat customer!