Manual flashing usually requires the or QFIL , which often require "authorized accounts" not available to the public. OPPO System Upgrade Tool | OPPO Global
If you have a global variant and want to reinstall the global software, use the OPPO System Upgrade Tool . oppo find x3 pro flash global rom
only support updates within the same region's firmware and will not allow "cross-region" flashing from Chinese to Global versions. 2. How to "Globalize" your Chinese ROM Manual flashing usually requires the or QFIL ,