Airalo does not offer a true unlimited‑data eSIM for China.
The plans that carry the word “Unlimited” provide a 3 GB per day data cap; after that daily quota the speed is reduced to 1 Mbps. There is no plan with an unrestricted data allowance that continues at standard speed.
If a higher data volume is desired, Airalo offers large–capacity fixed‑data plans. For example, the Asialink ‑ 100 GB plan gives 100 GB for 180 days, and the Asialink ‑ 50 GB plan delivers 50 GB for 90 days. These are definitive data packages that must be depleted within their validity period, but they provide a more generous quantity than the restricted “Unlimited” daily allotments.