Why the China eSIM matters
For many travellers the first surprise in China is not the entry process, but the internet. Travellers from Germany, Austria or Switzerland quickly notice that familiar services such as Google, WhatsApp, YouTube, Gmail or Google Maps are not reliably reachable through ordinary local connections as they are at home.
From my own travel experience, a suitable mainland China eSIM is one of the most important things to sort out before departure. It does not replace common sense and it does not guarantee every service in every situation. But it can be far easier than trying to buy a local SIM card after arrival.

My practical recommendation
I use Trip.com myself for China travel and recommend it here for a reason. For mainland China eSIMs, Trip.com was practical and inexpensive in my own experience. On my trips the eSIM worked, and this is often one of the decisive practical issues for travellers in China.
Trip.com is not just a random travel site with no China background. Trip.com Group is deeply rooted in the Chinese travel market; its Ctrip brand is described by Trip.com Group as headquartered in Shanghai. For China hotels, flights, rail and eSIMs, that matters because the platform is close to the Chinese travel market.
Transparency: The links to Trip.com are partner links. If a booking is made through these links, the site operator may receive a commission. The visitor price should not increase because of this. The recommendation is based on own use.
Note: tariffs, availability and technical details can change. Before buying, check whether the eSIM matches your phone, travel dates and data needs.
Check before travelling
Check whether your device supports eSIM and whether it is locked by a mobile carrier.
Install or prepare the eSIM before departure. After arrival, it should ideally only need activation.
Mainland China, Hong Kong and Macau are not always covered in the same way. Choose the destination carefully.
eSIM, hotels and flights belong together
For a first China trip, internet access is not just comfort. It affects hotel addresses, train connections, translation, maps, contact with home and checking bookings. That is why this topic belongs directly to practical China preparation.
Hotels now have their own page, because the topic deserves more than one button. It covers firm mattresses, large beds, good four star hotels and personal experience with hotels in China.