Ku qor sii wadida faqradan - Doorashadii Golaha Sharci dejinta ee 2020, Cheng waxaa magacaabay Xisbiga Madaniga ah si uu ugu tartamo deegaanka Jasiiradda Hong Kong. Wuxuu beddelay Tanya Chan, oo laga mamnuucay inay tartanto sababo la xiriira xukunkeeda la joojiyay ee mudaaharaadyadii Occupy 2014
Waxaad Doorashooyinka horudhaca ah ee dimuqraadiyadda ee bishii Luulyo 2020, Cheng wuxuu galay kaalinta afaraad, kadib Ted Hui, Tiffany Yuen, iyo Fergus Leung. Codadkiisii 11,090 (12.26% codbixiyayaasha) ayaa u xaqiijiyay booska magacaabista doorashada sharci dejinta.