The Malaysian Chamber of Commerce (MAYCHAM) organised a solo retrospective, Nature as Teacher and Model, which was held at the Penthoue of the Malaysia Building, Hong Kong. The exhibition was held in commemoration of the 125th anniversary of Mun Sen's birth and featured 26 paintings of various mediums, featuring landscapes and figures. Michael & Saniza Collection were the sponsors and M+ Museum was curator. Due to COVID restrictions at the time, the opening was livestreamed on Facebook, and only 20 people were allowed to attend the event. According to an article written by Saniza Othman-Yong, these were the attendees of the opening:

The Honourable Bernard Chan, Chairman of Tai Kwun Culture and Arts and the Hong Kong Palace Museum; Suhanya Raffel, Executive Director of M+ Museum; Alice Mong, Head of Asia Society Hong Kong Centre; President Wei Shyy of the Hong Kong University of Science and Technology; Dato’ Khai Choon Gan, Chairman of the Malaysian Chamber of Commerce; Lawrence Chia, Chairman of the Singapore Chamber of Commerce; Dato’ Seri Cheah Cheng Hye, Chairman of Value Partners Group; and Consul Generals from Singapore, Canada, Germany, Turkey and Kazhakstan. The Master of Ceremonies was Ng Woan Chiun Joe. In addition, art movers and shakers Pauline Yao, Lead Curator of M+ Museum; Catherine Kwai, Founder of Kwai Fung Hin Gallery; Daphne King, Director of Alisan Fine Arts; Enid Tsui, Art Editor at the South China Morning Post (SCMP); and Olivier Giles of Tatler

2020. "Silhouettes: Collecting Singapore Modern | Selections from the Collection of Su-Yen Wong and Fermin Diez". The Private Museum, Online Exhibition. https://theprivatemuseum.wixsite.com/silhouettes 2020. "Silhouettes: Collecting Singapore Modern | Selections from the Collection of Su-Yen Wong and Fermin Diez". The Private Museum, exhibition catalogue https://7dd1e3c4-71d6-4c67-97d8-f445e4bcfbc9.filesusr.com/ugd/009cb6_9ba19e4211db45b68748fbc0a30d390a.pdf