China

China has an in-force Remote ID standard, but it is a separate, genuinely incompatible wire protocol — not a variant of ASTM F3411/ASD-STAN. DRIFT does not and cannot implement it without a second, from-scratch encoder stack.

Status

GB 46750-2025 — 《民用无人驾驶航空器系统运行识别规范》 (“Civil Unmanned Aircraft System Operation Identification Specification”) — was published 2025-10-31 and became effective 2026-05-01. A weight-tiered mandate applies: RPA 250 g – 25 kg require Broadcast Remote ID; RPA above 25 kg require Network Remote ID (per Transport Canada’s own regulatory text, cited as a secondary corroboration of an operative Chinese mandate — see Canada).

Why it’s incompatible

The upstream opendroneid-core-c project (which DRIFT vendors its ASTM/ODID encoder from) maintains a dedicated, separate libopendroneidcn module for China’s format, confirming the two protocols are not interchangeable:

  • A flag-bitmask chain (Type/Version/DataLen/Flags/Data) instead of ASTM F3411’s six fixed 25-byte message types.
  • Mandatory dual identity — a 20-character serial number and an 8-character UIN registration ID — rather than ASTM’s serial-or-session-ID choice.
  • No authentication message.
  • Mandatory ground-control-station/operator position and accuracy-category fields that ASTM F3411 leaves optional or undefined.
  • Support for both WGS-84 and CGCS2000 coordinate systems.

Sources

Last verified 2026-09-10. The exact GB 46750-2025 title/date was cross-checked against a secondary aggregator, not an independently retrieved SAMR/CAAC primary document — treat the title transliteration and precise dates as best-current- knowledge rather than fully primary-sourced.