Not going to make the slightest difference China. 30L NOT available for Departures so the figures don't matter and if you request it if it ever does become available you can expect a looooong delay at the hold because as the Arrival runway, all of the arrivals wil have priority over you as a departure.
Of course... You could wait for a vortex gap behind an arriving A380 in the 2020 when they are delivered!!!
