Direct proof of use
The CH-4B/CH-4 appears in the 2014 Yemen Civil War record as a Saudi-led coalition armed UAV. On May 23, 2022, a drone crashed in Sanaa after Houthi authorities said their air defenses had downed a Saudi-led coalition aircraft; Al Jazeera, citing news agencies, reported the Houthi spokesman's statement that the aircraft was a Chinese-made CH4 armed spy plane belonging to the Saudi air force.
The U.S. Army OE Watch/T2COM summary of UAV activity in Yemen and Saudi Arabia described the same late-May 2022 sequence, identifying one of the claimed Saudi losses as a CASC Rainbow CH-4 UCAV and judging the claims credible while noting that the public evidence consisted of wreckage videos. A separate Global Defense Corp report, based on Houthi-aligned media, described a Chinese-made CH-4B reportedly belonging to the Saudi-led coalition being shot down in Hajjah in February 2022.
Sources: Al Jazeera Sanaa drone crash, T2COM UAV technologies Yemen Saudi Arabia, Global Defense Corp CH-4B shootdowns
Timeline
In February 2022, Houthi-aligned reporting said a CH-4-type surveillance drone, believed to be a Chinese-made CH-4B and reportedly belonging to the Saudi-led coalition, was destroyed in Hajjah province while performing hostile actions. Global Defense Corp reported the incident and said it was part of a pattern of Saudi CH-4 losses over Yemen.
On May 23, 2022, Houthi officials said they shot down a Chinese-made CH4 armed spy plane over Sanaa. Al Jazeera reported the crash killed three people and injured three others in a busy commercial area, while T2COM placed the CH-4 incident in a four-day sequence of claimed Saudi UAV shootdowns.
Sources: Global Defense Corp CH-4B shootdowns, Al Jazeera Sanaa drone crash, T2COM UAV technologies Yemen Saudi Arabia
Narrative
The documented role was armed reconnaissance and battlefield surveillance for the Saudi-led coalition side. Public reporting on the Yemen incidents repeatedly uses terms such as armed spy plane, surveillance drone, UCAV, and hostile missions, which support coalition fielding of the CH-4 family over Houthi-controlled or contested areas but do not independently identify specific CH-4B strikes, targets, or munition releases.
The strongest public incident record is the May 2022 Sanaa crash because it is corroborated by international news-agency reporting and by OE Watch/T2COM's later summary. Earlier and additional losses in Jawf, Amran, Hajjah, Marib, and Sanaa are reported in local or Houthi-aligned sources and open-source loss lists; those reports support repeated coalition CH-4 presence, but attribution and exact variant identification often depend on wreckage video, claimed statements, or local media.
Sources: Al Jazeera Sanaa drone crash, T2COM UAV technologies Yemen Saudi Arabia, Global Defense Corp CH-4B shootdowns
