MH370
We entered HCM FIR last night westbound at FL340, passing Moxon (the boundary with WSJC) at about 1720Z, transitted HCM and Phnom Penh and exited, passing overhead PNH at about 1810Z.
We experienced no problem with VHF Comms with HCM Centre, and VVTS CPDLC/ADS also worked fine. We encountered no adverse wx - in fact it was a beautiful clear NE monsoon night, though there was some limited scattered lightning visible way off to the SW.
121.5 was congested, with both HCM Centre and another MH flight trying to contact MH370. HCM Centre were also making repeated attempts to contact the aircraft on the normal Centre frequency.