Not sure why you'd use a German catalogue for French Colonial stamps - Yvert and Maury are the French catalogues, although you don't need detail for these, which will be in any world catalogue. They were issued between 1889 and 1919. No monetary interest, if that's what you mean - the top left-hand stamp is the best in those terms, but is missing a cormer.
Maybe look again in Scott . Most of these stamps are listed under Indochina. The overprints on the second row are listed under French Offices in China.
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