Iwan and Manuela Wirth (right) will participate in Art Basel Hong Kong this weekend, presenting works by Phyllida Barlow (left), Mark Bradford and Philip Guston. [Photo/Agencies]

Iwan and Manuela Wirth－the art world's power couple－have their hands full with meetings ahead of Art Basel Hong Kong, which begins on Thursday.

They visited the first Gallery Weekend Beijing, held from March 17 to 19, before going to Shanghai where a burgeoning scene has attracted a strong international presence of gallerists, dealers and collectors.

The couple co-founded the Hauser & Wirth gallery in Zurich in 1992 and have expanded their art empire to London, New York, Los Angeles and Somerset.

In 2015, they topped the ArtReview Power 100, the influential annual list of the most powerful personalities in the global art world.

They will celebrate the gallery's 25th anniversary with a carefully curated booth at the upcoming Hong Kong fair. Distinctive areas will be created in the booth to show the works of three artists－Phyllida Barlow, Mark Bradford and Philip Guston.