XII.In three notes verbales dated 11 August 1989, the Secretary-General asked the Permanent Mission of the People's Republic of China to the United Nations (the Chinese Mission) to extend the Applicants' secondment for two years. But on 23 August 1989, the Chinese Mission informed the Secretariat that "the Chinese Government has consented to the extension of Mr. Qiu's secondment through 31 December 1989". It added that a "recommendation from the Chinese Government for his successor will be communicated to the Secretariat in a separate note". The same reply was made with regard to the Applicants Yao and Zhou. XIII.The appointments of the three Applicants were eventually extended from 1 to 31 January 1990. XIV.The three Applicants gave complete satisfaction in the performance of their functions in the United Nations, particularly during 1989 and until the date of their separation from service on 31 January 1990. There was no allegation of any sign of antagonism towards other colleagues, certainly not Chinese colleagues. There was no sign of political animosity. XV.The Tribunal notes that, on the occasion of their separation from service, the three Applicants received a letter dated 20 February 1990, which, in particular, drew their attention to the following point: "1.Under the United States Government regulations, a staff member's authorized stay in the United States expires automatically upon separation from service or transfer to a duty station outside of the United States, even if the G-4- 18 - visa stamped in the passport indicates it is valid beyond the separation or transfer date. However, if additional time is required, the application must be made in writing directly to the Travel Control Section, United States Immigration and Naturalization Service, 26 Federal Plaza, New York, N.Y. 10267. Proof of date of separation from service or of date
**Analysis**
The text appears to be related to the employment and activities of international civil servants in the United Nations, specifically regarding the secondment of three individuals, Qiu, Yao, and Zhou, and their eventual separation from service. The text discusses the formalities and regulations surrounding their employment, including the extension of their secondment and the requirements for their departure from the United States. There is no mention of economic development, natural resources, or other categories that are typically associated with international cooperation or development.

**Category**
Employment, International relations