User talk:Keungchow
Hello, Keungchow! Welcome to Wikivoyage.
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Your edit to the Vietnam page was reverted - click that link to see why, but basically, it appears that you substituted a non-governmental link for a Vietnamese government link, and you didn't explain the reason for your edit and claimed it was "minor". Read Wikivoyage:External links, especially the "What not to link to" section, and also have a look at don't tout and tour, which may be relevant. If the link you gave is an official Vietnamese government link, you need to indicate that in your edit summary, which you would type in the "Summary" box below your edit screen.
Do be careful not to make the same or a similar edit again without explanation, because if you do that, it's likely that your editing privileges will be blocked.
Best,