Unsurprisingly, on bilibili, China's actual equivalent to Youtube, a search about Sino-Serbian relations returns mostly Serbian turbofolk music videos with a sizeable group of fans who subscribe to the physical and psychological genocide.

Examples include translated videos of Karadžić describing how they will treat the enemy with starvation (psychological warfare). Picture below shows a commenter LARPing as a Serb army general threatening to Muslims into ćevapi when he comes to stage a siege on Sarajevo.

On a bizarre occasion I saw a video of a Chinese woman singing Oj Alija Alijo in a Chinese accent. Genocide rhetoric, camera reels of Serb generals launching offensives, and turbofolk songs "dissing" Muslims/Croats and portraying Serbia's strength combined together

makes this rabbit hole.
The Sino-Serbian friendship rhetoric attributes this to Serbia being a strong country that fought hard to maintain its sovereignty despite being attacked by everyone without someone to count on, which will now be China.

Yugoslavia was in the Socialist bloc and the Non-Aligned Movement, and maintained a socialist friendship with China that produced fond memories of the country through films in the minds of many older generation Chinese. This might explain the popularity of the fandom

as they view Serbia as Yugoslavia's legitimate successor and believe that the other ethnicities were stirring trouble with Western support, while ignoring the Srebrenica genocide and the other atrocities of the Serb army in Bosnia.

The two most famous films exported by Yugoslavia to China in the era before economic liberalisation were «Most» and «Valter brani Sarajevo». Many Chinese of that time admired the bravery and the patriotism that the partisans had regardless of religion.

They also learned the song Bella Ciao from «Most». However, one must distinguish that behind oficial propaganda the spirit of partisan inter-ethnic unity was definitely not the spirit of destruction and ethnonationalism propagated by the SANU Memorandum and the Serb rhetoric

in the Yugoslav wars. In «Valter brani Sarajevo», the mysterious man Walter manages to defeat the Germans, protecting the city, symbolically unifying it. And who was there to protect it during the siege by the Serb Army?

State propaganda portraying China reaching out to Serbia, a country that "fought off its neighbours and NATO when Yugoslavia inevitably had to break up" replaces the multiethnic heroism in the face of danger in both wars.

Jebi ovo "strategisko prijateljstvo".