Visa-free transit in Guangzhou with VOA of Myanmar

Hello,
Iam Lithuanian citizen and I am planning to go by plane from Vilnius to Guangzhou(1 stop in Moscow),then the next day by plane to Yangon(Myanmar). After 2 weeks in Myanmar I will be flying back to Guangzhou,then the next day (after less than than 24 hour ) I will take a plain back to Vilnius.I have confirmed tickets Vilnius-Guangzhou, Guangzhou-Vilnius and Guangzhou-Yangon ,Yangon-Guangzhou.
I need visa of Myanmar and plan to get it at the time of arriving in Yangon.I am flying to Yangon by Myamar Airwais International flight number 8M712.This airline promises VOA of Myanmar to all passengers of this flight.

Could I apply for free-transit in Guangzhou without any Myanmar visa at the time of applying and what documents I have to give?
Thanks,
Daiva