求翻译：我公司CCAR-121R4运行审定工作小组积极跟进与民航华北地区管理局的沟通协调，并于7月18日获得民航华北地区管理局批准的CCAR-121R4过渡期计划，首都航空成为华北地区首家接受CCAR-121R4运行合格审定并按照CCAR-121R4规章开展运行工作的航空公司。是什么意思？

I run validation working group actively follow up company CCAR-121R4 communication and coordination with the civil aviation authority in North China area, on July 18 and approved by the civil aviation authority in North China area CCAR-121R4 of transition plans, capital airlines to become first certification accept CCAR-121R4 run and follow the CCAR-121R4 in North China Airlines that work run the regulations.