- Gas explosion at the Liushenyu coal mine in Shanxi killed at least 82 and injured over 120 — the deadliest Chinese mining accident since 2009.
- Investigators found concealed tunnels, fake doors and missing gas monitors that hampered rescue efforts.
- The mine kept "yin-yang" twin sets of plans and used unregistered subcontracted workers without trackers to hide production and evade inspections.
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