1921~1922 华盛顿会议 (nov 12, 1921 – feb 6, 1922)
Description:
#1921.11.12~1922.2.6与会各国缔结《九国公约》
{实质：列强同意将“门户开放“、”机会均等”作为侵略中国的共同原则}
Added to timeline:
Date:
nov 12, 1921
feb 6, 1922
~ 2 months and 26 days