From Chinese students in Germany, a technology promise to the motherland - (2014)

Illustrating the grip the Communist party and government try to maintain on overseas Chinese students, an exchange of letters between President Xi Jinping and Chinese students in Germany has produced passionate promises from the students to serve the motherland - and deliver advanced technology backed to China, the state news media reported.

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To at least one Western intelligence official, the exchange was a textbook exercise in ensuring a steady flow of science and technology back to China from educational institutions and companies in the West.