After his journeys to China between 1868 and 1871 Freiherr Ferdinand von Richthofen recommended the Bay of Jiaozhou as possible German naval base.
费迪南德·里希特霍芬男爵在一八六八至1871年的中国之旅后，推荐胶州湾为可能的德国海军基地。
After his journeys to China between 1868 and 1871 Freiherr Ferdinand von Richthofen recommended the Bay of Jiaozhou as possible German naval base.
费迪南德·里希特霍芬男爵在一八六八至1871年的中国之旅后，推荐胶州湾为可能的德国海军基地。
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