Some online resources for my dissertation

Periodicals:

Collectanae Commissionis Synodalis ou 公教教育刊 (1st volume only: May 1928).
公教婦女季刊 (March 1934 - June 1939, quarterly, 22 issues).
廣州市政公報 (May 1940-November 1943, monthly, 43 issues).
教育研究 (1928-1948, monthly, 110 issues with 12 pairs).
Les Missions catholiques : bulletin hebdomadaire de l'Oeuvre de la propagation de la foi (1868-1932, weekly, 68 issues).
聖教雜誌 (Revue catholique, 1912-1938, monthly, 312 issues).
中華公教青年季刊 (1929-1930, quarterly, 5 issues, blurred except for photos and therefore somewhat less useful).

Observations: most of these are provided by National Library of China, National Digital Library. Usually the index of each issue is provided. The problem is that there is no way to search all the indexes of a whole periodical, each time one must click on the issue and then only is the index available (and then ctrl+f does not work). The journal provided by the Bibliothèque Nationale de France is not without inconvenience either: some issues did not go through OCR (Optical Character Recognition) and they are not even indexed, some are only indexed, which leads to the same observation as for the NLC, some went through a full OCR process though not very satisfactorliy.

Historians do not care about the quantity of data provided if the ways to navigate through it is too time-consuming.

Other sources of articles that are collected around a main theme:
The website by Baptist University of Hong Kong on how Christians fared in the transition towards Communism : Christianity in Contemporary China Clipping Database
The Hong Kong Catholic Diocese Memorial page, listing every deceased member of the clergy and religious orders who worked in Hong Kong from the beginning.

These databases are the ultimate tools for historians because they are built for the purpose of historical or memorial enterprises. The first website is only a catalogue and does not provide with the actual documents.

Online resources of a somewhat lesser value:

Official summaries and websites:
http://www.gzzxws.gov.cn/gzws/gzws/ml/52/200809/t20080916_7823.htm
http://3ms.gzyxedu.net/
http://fangzhi.chinacath.org/: this website is of particular interest to get a rather brief Chinese point of view on the Catholic history of each locality in Guangdong and therefore in the Catholic territory under the jurisdiction of Guangzhou which is the core of my interest. It can be inaccurate.

Wikipedia, hudong, and a blog:
http://zh.wikipedia.org/wiki/%E5%B9%BF%E5%B7%9E%E5%B8%82%E7%AC%AC%E4%B8%89%E4%B8%AD%E5%AD%A6
http://www.hudong.com/wiki/%E6%98%8E%E5%BE%B7%E5%A5%B3%E4%B8%AD
http://hi.baidu.com/shisong109/blog/item/cd76290e2941eef037d1226b.html

Note: my small knowledge of Chinese does not allow me to evaluate correctly the accuracy of these references. So I would suggest to handle these with great caution.