1. Introduction: Chi's attack efficiency at Beijing Guoan
2. The background and history of Beijing Guoan
3. Chi's achievements in attacking
4. Chi's performance during the season
5. Chi's contributions to the team's success
6. The challenges faced by Chi during his time at Beijing Guoan
7. How Chi has been able to improve his performance
8. The impact of Chi's performances on the team's overall performance
9. Conclusion: Chi's contribution to the team's success and his future prospects
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