I agree that in Serbia's foreign policy nothing will change because foreign policy of a country is the outcome of its geopolitical position. However, in a few first months. the atmospherics will probably change.
Vucic, without ever acknowledging it, followed Tito's foreign policy.
The new govt (if is formed) will at first go back to a blind pro-EU policy until they get disappointed like everybody before them & will then try to reignite relations with China.