China Proxies

China has a deep published pool relative to most catalogue entries. Use the China depth for measured country-level sampling, not for routing around a quota, challenge, or block. Long-lived China flows should prefer a documented sticky session; independent observations can request rotation. In both China modes, connection reuse and live supply can produce the same exit more than once. China pool depth also cannot authorize collection: the destination's terms, robots guidance, contracts, authentication boundaries, rate controls, and applicable law remain the controlling constraints. Treat a block, CAPTCHA, quota, or explicit denial as a stop or review signal across the whole China pool rather than rotating around it. Record China failures as data; do not hide them with unlimited retries.

The immediately larger Asia catalogue entry than China is Pakistan at 700,273 addresses, and the next smaller is Philippines at 613,557. In the China comparison set, the regional leader is Indonesia with 2,664,464. These China capacity comparisons are useful only when the workload could legitimately run from more than one country. Choose China when the research question specifically needs a network-origin observation from China. Choose a different country from China only when it is a valid control or a separate market in the study. Combining China observations with other countries in one unlabeled dataset makes regional differences impossible to interpret. Preserve the requested China route, observed exit country, network type, timestamp, source, response class, and validation outcome on every retained record.

Before using a China result, capture five things: the canonical source URL and permission basis; the Databay network and countryCode-cn setting; the observed exit IP, ASN, and geolocation source; the browser, account, language, currency, address, cookie, and device state; and the UTC timestamp plus response evidence. Repeat the China check from a controlled reference and label missing, blocked, challenged, stale, or personalized responses instead of treating them as ordinary content. For a consequential China price, availability, advertising, search, compliance, or product decision, obtain a second authorized source or local review. This China workflow makes the 663,140-address catalogue figure useful as coverage context without pretending it proves a resident's experience.