eSIMania does not offer an unlimited data eSIM for China.
Instead, the provider sells fixed data plans that give travelers a hard data limit that must be used within a set validity period. For example, the CN 51.2GB for 30 days plan gives 50GB of data that must be used within 30 days and costs $64.00 USD. A longer‑term option, CN 51.2GB for 180 days, offers the same 50GB limit for 180 days at $77.04 USD, while the Asia‑20 51.2GB for 180 days plan provides 50GB that can be used across China and 19 other countries for $149.76 USD.
Choosing one of these fixed data plans can be more cost‑effective for most travelers unless they anticipate consuming far more data than the plan’s cap. The plans are straightforward: the data allowance and validity are clear, and there is no mechanism to add data beyond the stated limit within the validity period.