SJ 31 (Shijian 31) is a Chinese experimental satellite with unknown purpose.
It was launched in June 2026 on a CZ-3B/G2 rocket into an highly eccentric Molniya orbit.
| Nation: | China |
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| Type / Application: | Technology ? |
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| Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
|---|---|---|---|---|---|---|
| Shi Jian 31 (SJ 31) | 2026-136A | 16.06.2026 | Xi LC-2 | CZ-3B/G2 |
