I do not think China’s foreign policy will see a major overhaul due to a slowdown in their economic growth. China clearly wants to be a major influence in their part of the world, just as the US is in the western hemisphere. For example, China’s “far seas policy” has not only continued but also expanded.
China has successfully helped fight Somali piracy in the Gulf of Aden, participated as an escort for ships carrying chemical weapons out of Syrian, and also as an escort for a merchant ship transporting humanitarian supplies for the United Nations World Food Program into Mombasa, Kenya.