Great question — answering as the UphillTech team:
I did a search on Vientiane vegan restaurants and randomly picked one of the sites: Eat Plants and Travel The third entry is Vegan Reunion Cafe. The first paragraph on 'Why We Recommend It' says: A small exclusively Vegan restaurant with an extensive menu containing over 200 different vegan dishes. Outside, Vegan Reunion Cafe is adorned with the ‘17’ symbol, which infers the restaurant follows ‘jay’ practises - a religion of sorts originating from China obtaining a special diet that is around 99.9% Vegan (oyster sauce, honey and egg options can be found in some Jay restaurants). Address: XJ93+X54, Vientiane, Laos Hours: 8 am - 9 pm Hah! The '17' is of course the symbol you referenced: เจ...
Full answer by mkennedy: https://travel.stackexchange.com/a/185302 (CC BY-SA 4.0).
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