A march on handover day has almost become tradition in Hong Kong. But amid today's slogan-chanting and placard-waving, one group should bring smiles to the faces of thousands of disgruntled people expected to take to the streets - a choir giving musical expression to issues that had them fuming over the past months.
'We hope we can lighten the mood as everyone is likely to get pretty worked up during the protest,' says Haze Cheng Wai-sum, a co-founder of the Hong Kong Complaints Choir.
The group will make their debut at the pre-march rally at Victoria Park, with a tune composed by guitarist Ho Shan of indie band Pixel Toy and featuring lyrics based on gripes gathered from the public over several months.
'It won't be just one performance,' says Cheng. 'We will keep singing throughout the march and hope others will join us. It's a song written by Hong Kong people for Hong Kong people and it will make them smile.'
Ho, who composed the song in one evening, says he made it a simple tune, so people would be able to learn it quickly and sing along. 'We made it a happy children's song to contrast nicely with the heavy nature of the lyrics. It'll be easy for people to pick up and for us to adjust the tune to fit the words,' says Ho.
Finnish artists Tellervo Kalleinen and Oliver Kochta-Kalleinen organised the first complaints choir in Britain four years ago as a creative way to harness people's dissatisfaction. Fuelled by clips of the choir posted online, the idea was quickly taken up in more than 20 cities around the world, from Chicago to Singapore.
