Spiegel magazine reports that Hanning maintained longstanding contact with Wang Jianzheng, a former senior official who previously served at the Chinese embassy in East Germany. Investigators suggest Hanning made multiple trips to China, where he deepened connections with Wang, a figure known for translating German literature and specializing in regional geopolitical affairs.

Authorities apprehended Hanning on suspicion of leaking classified material provided by his former chief of staff. While prosecutors remain tight-lipped regarding the specific nature of the shared data, the investigation focuses on activities conducted well after Hanning concluded his official career in 2005. Hanning’s legal counsel has denied any compromise of German national interests, dismissing the charges as a wrongful prosecution.