Curator and art critic Nicolas Bourriaud originated and highlighted the fine art practice of Relational Aesthetics, insisting that art should not only be an outlet for artists but be socially engaged to bolster relationships among individuals. Szelit Cheung’s work echoes this particular function of art. Cheung’s paintings invite audiences to contemplate their relationship with the artwork and society. His work explores the relationship between space and presence, employing chiaroscuro and hues in a minimal setting, to reflect on the interactions between one's self and environment.

法國藝評家尼古拉斯‧布爾里亞德（Nicolas Bourriaud）在《關係美學》（relational aesthetics）中提及：「藝術」應該是有社會性的互動，並提升人與人之間的關係，不光只是純粹展示藝術家的創作而已。張施烈的創作除了帶有「空性」之外，「關係」是另外重要的概念元素。他希望透過自身的創作，讓觀眾體驗「空性」，並從中產生自身（作品）、觀眾（他者）及社會（共鳴）這三者的連繫。他的創作風格以簡約見稱，其作品佈局都以「空間」、「光影」和「純色」這三者有關，從中反映自身在生活裡與不同事物之間的互動。