Say mach number- You're clearly happy, but many are not. Most don't leave Monarch, BA, Thomson or even easy jet..... but a lot are leaving Ryanair....3 are in my company in China and they are bitter about their experience at Ryanair.
Your situation of Ryanair bliss seems unusual so please excuse my scepticism.
Anyway no food and water will keep you healthy for the Chinese medical, I'm sure your colleagues here will welcome you.