Does Vientiane need nucleic acid to Kunming high-speed rail?

Do you need nucleic acid for the high-speed train from Vientiane to Kunming? According to the relevant public information, as of January 9, 223, when entering Kunming, the health code and negative nucleic acid certificate will no longer be checked, and there is no need to report, and the landing inspection and three-day three-day inspection will no longer be carried out. Kunming belongs to the epidemic normalization management area, and Vientiane does not need to be isolated when flying to Kunming.