# Relationship history for MSHA mine 6900006

Current hierarchy: **Guocao  Qian → USA Fanter Corp., Ltd. → USA Fanter 1 Corp., Ltd.**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Guocao  Qian → USA Fanter 1 Corp., Ltd.; 2016-04-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** USA Fanter Corp., Ltd. → USA Fanter 1 Corp., Ltd.; 2016-04-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guocao  Qian → USA Fanter Corp., Ltd.; 2016-04-25 to current/open; source msha-controller-operator-history