1.
The Foreign Troops and the Political Situation in Guangdong in the Reign of Northern Warlords(1913～1925);
北洋时期的入粤客军与广东政局（1913～1925）
2.
The Financial Division of the Central and Locality during the Period of the Governments of the Northern Warlords (1912--1927);
北洋时期的国地财政划分（1912—927年）
3.
A Research Summary on Ministry of Communications and Railway Development In Northern Time;
交通部与北洋时期铁路发展研究综述
4.
A review on Ministry of Communications and Railway Vocational Education in Northern Time
交通部与北洋时期铁路职业教育述论
5.
Education of Religious School and Modernization of the Chinese Culture during the Reign of the Beiyang Government;
北洋时期的宗教学校教育与中国文化现代化
6.
The County Administration System in the Northern Warlords Government Period
走出传统:北洋政府时期的县公署制度
7.
Research on the Relieving Famine Policy during Northern Warlords Government (1912-1927);
北洋政府时期（1912-1927）荒政研究
8.
A Commentary on Female Normal Education in the Period of Late Qing Dynasty and Beiyang State;
清末北洋政府时期女子师范教育述评
9.
MA FU-XIANG,THE SUIYUAN GOVERNOR IN THE REIGN OF THE NORTHERN WARLORDS;
北洋军阀统治时期的绥远都统马福祥
10.
Chinese People s Morality under the Reign of Northern Warlords;
北洋军阀统治时期国民道德状况探析
11.
Inheritance and Changes--Folklore changes during the Beiyang Government
继承与异动——北洋军阀时期的风俗变革
12.
He later became Vice-President and then President of the Republic under the regime of the Northern warlord clique.
在北洋军阀统治时期曾任副总统和总统。
13.
Xiong Xiling's Issues of State Structure in the Period of Warlord
论北洋军阀统治时期熊希龄的国家结构观
14.
Transformation from Forest Outlaws to Warlords Army during the Reign of Northern Warlords Government
浅析北洋政府时期绿林向军阀部队的转化
15.
Comparison Between The Company Law of Later Qing Dynasty and The Company Rule of the Northern Warlords Government
清末《公司律》和北洋政府时期《公司条例》比较研究
16.
The Governmental Behaviour and the Industrial Development during the Period of the Northern Warlords
北洋军阀统治时期的政府行为与工业发展
17.
Research on the Composition of Peking Government s Bureaucracies (1916-1928);
北洋军阀统治时期中央官僚构成研究（1916-1928）
18.
Beiyang Warlords Time Two Heterogeneity Legislatures;
北洋军阀时期两种不同性质的立法机关