привет, не знаю деталей, но на википедии в статье "Visa policy of Myanmar" написано Nationals of the following eight countries do not require a visa to enter Myanmar [вкл. Россию] ... However, to qualify for visa-free entry, they must enter and leave Myanmar through one of the following ports of entry:
1. Yangon International Airport 2.
2. Nay Pyi Taw International Airport
3. Mandalay International Airport Т.е. наземное пересечение (по крайней мере по инфе из вики) не дает безвиз с Мьянмой