Wu Ken, China's Ambassador to Germany, attends the welcome ceremony of the diplomatic corps at Bellevue Palace in Berlin, Germany, January 13, 2020. REUTERS/Annegret Hilse/File Photo Acquire Licensing Rights BERLIN, Sept 29 (Reuters) - China's ambassador to Germany called for Europe to be more open to Chinese investment, urging deeper cooperation in areas such as electric cars and 5G technology after a series of clashes. Berlin is in the process of reassessing its relationship with China, a country it dubs both a partner and a rival. As part of that process, Germany's interior ministry has proposed forcing telecoms operators to...