How to travel from Nanning, Guangxi to Bangkok, Thailand is the cheapest? (including visa and travel expenses, it doesn't matter how many times you go)

Take the train to Kunming, then take the bus from Kunming to Luang Prabang, Laos, and then transfer to Bangkok, Thailand.

There are more than 200 round trips from Nanning to Kunming, more than 300 round trips from Kunming to Luang Prabang and more than 400 round trips from Luang Prabang to Bangkok, so the round-trip fare is less than 1 0,000 yuan.

Thailand visa and Laos visa add up to 500 yuan.