Bilibili is China's massive entertainment platform combining anime, gaming streams, user-generated content, and licensed shows. While partially accessible internationally, the full Chinese library requires a local IP. A VPN helps fans access the complete catalog. The reason for this is structural: streaming services license content country by country, and Bilibili's catalogue in each market reflects whichever distribution deals were signed there. A title that's available on Bilibili in the US might be on a competitor's platform in the UK, or vice versa.
A VPN sidesteps the geography problem entirely. Bilibili sees the IP of GhostShield's exit server, not your real one, and serves you the catalogue for that exit region. The streaming app makes no distinction between a 'real' local user and a VPN-connected one as long as the traffic looks like residential broadband — which is exactly what WireGuard with ChaCha20-Poly1305 over GhostShield's network produces.
What you can't do is bend the laws of physics: a stream from Bilibili's origin servers will always have more latency from far away. Pick the GhostShield server closest to Bilibili's data centres in the region you want, not the one closest to you.