All borders aren't closed, but taking a weekend trip to Kuala Lumpur, Phnom Penh or Da Nang was always a better option. Tickets are cheap and you get to travel instead of sitting in a van for a full day.
Try to upload Cover letter, typed and signed by a family member who sponsors the trip, and whose name on the above bank statement along with a signed photocopy of passport of the sponsor (that's you)