As soon as Hong Kong’s new national security law came into force last week, Ivan Ng removed all the protest-themed paintings, posters and flags from the list of items for sale at his Onestep Printing shop.

Sandra Leung at Wefund.hk, which sells protest-themed artwork and accessories, said she has suspended sales of protective gear worn by protesters, flags with the slogan “Liberate Hong Kong,” and other items carrying popular chants.