"Satellite-Internet Technology Demonstration Satellites" (Weixing hulianwang jishu shiyan weixing, WHJSW), likely a test as part of the state SatNet constellation. Specifically, the satellites demonstrated a new "satellite-rocket connection and separation device" allowing more reliable, efficient use of fairing space with large numbers of satellites.

The launch date was Tuesday, September 16, 2025 at 1:06 AM (UTC).

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Provider	CASC
Vehicle	Long March 2C
Location	LA-4 / Pad 603 (SLS-2) Jiuquan Satellite Launch Center China
All dates and times should be submitted in UTC timezone. Use Estimated Date if you don't know the official launch date and time; otherwise, use Window Opens/Closes and/or Planned T-0, which will override the Estimated Date.
— Estimated Date —
Date
— Window Opens —
Date
Time
Launch Date	Tuesday, September 16, 2025
Launch Time	1:06 AM (UTC)
Launch Time (Pad)
— Planned T-0 —
Date	Tuesday, September 16, 2025
Time	1:06 AM (UTC)
— Window Closes —
Date	Tuesday, September 16, 2025
Time	1:06 AM (UTC)

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WHJSW (SatNet Demo Satellites)

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