Just got an email from Air China, Bangkok £358 and Manila £343, I flew with them earlier in the year and although not on the same level as BA, and the entertainment package left a lot to be desired for this price its an absolute bargain.
I also took advantage of the 72Hour visa free visit to the major cities and spent two nights in Beijing. Unlike other Airline Air China will let you book long connections in order to take advantage of this.
Just don’t take any of your Chinese power banks with you, I had both of mine confiscated by the Chinese authorities, one on the way in and the other on the way out. At least they made it back home.