H1B&H4 revalidation in Vancuver

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Hi,

I am planning to go to Vancuver , Canada for my H1b revalidation adn also h4 for my wife. Is it okay and safe to go there and get it stamped??

I am in california ,vancuver is near to me , so any suggestions, experiences from anybody ,Please share.

Could you please elobrate how can I go and book appoitnemtns in Vancuver, canada??

Please share your valuable opinions

Thanks!