Chinese firms have plowed at least 145 billion euros into Europe since 2010, but investment has been slowing recently as several European governments tighten rules on acquisitions by foreign firms.
Billions of euros worth of critically endangered eels are trafficked each year from Europe, ending up in China and Japan in what is "the largest wildlife crime on Earth," campaigners say.
As doubts grow over China's 'Belt and Road' trade infrastructure project, the EU is launching an alternative plan for Asia it says will not saddle countries with debt they cannot repay.
The EU urges the US, China and Russia to work together to ease worsening global trade tensions, warning that they could otherwise spiral into "conflict and chaos".
China and the EU signed their first joint declaration since 2015 following a meeting between Juncker, European Council President Donald Tusk and Chinese Premier Li Keqiang.