During the 20th EU-China Summit, 16 July 2018 (Beijing, China) the European Union and China have signed an ocean partnership agreement, entitled, Blue Partnership for the Oceans: towards better ocean governance, sustainable fisheries and a thriving maritime economy. China had expressed its interest in such a partnership at previous high-level dialogues on oceans affairs (2017).
See further, the EU press release and Joint Statement (para. 33).