The Hong Kong Wedding Fair went ahead 22-24th May with various measures in place to prtect the participants

In a Press Release sent out just ahead of the show opening, the organisers went into further detail on the measures:
M3 - MWE20 press release_ENG
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This is the first in a series of exhibitions taking place in Hong Kong in the next months - for details of other expos going ahead, this page provides a good guide: