西西（1938- ）是香港著名的小說家，其第一本長篇小說《我城》， 是香港文學的經典。香港回歸中國以後，論者多從「本土認同」的方向 理解此書，但小說包含的「異質性」（heterogeneity），又令此書充滿 各種詮釋的可能。本論文特別從一個跟「本土」極端相反的空間出發： 「外太空」，分析《我城》的科幻元素及現代性。由科學和技術引發的 現代性討論中，「科幻小說」的探討是重點之一。《我城》不是科幻小 說，但罕有地加入不少「科幻」或類近「科幻」的元素。本論文先分析 《我城》三層地域空間的佈置，說明「外太空」出現在小說的首尾兩章， 相關的科幻元素則出現在主角阿果身上，故這個空間在小說主題及人物喻意上，均處關鍵位置。然後，本論文從「惡托邦」和「末世論」出發，分析《我城》如何諧擬和改寫這兩個重要的概念，從「惡托邦」之路回轉重生。《我城》雖然無意在科幻文類中獨僻蹊徑，更非藉小說介入複雜的科技政治討論，但於七十年代中已引入的科幻元素和改寫效果，在同期兩岸三地文學之中別樹一幟。從本土意識來說，七十年代中期，不少香港作家都觸及這方面的題材，《我城》不單回應時代青年共同關心的課題，而且在「現代性」思考上加入共融、共存的主題，表達獨步於時代的創見。

My City, the first novel of the renowned Hong Kong novelist Xixi (1938- ), is one of the masterpieces in contemporary Chinese fictions. Since the handover of the sovereignty after 1997 in Hong Kong, it has been discussed comprehensively as a work of local consciousness. However, the heterogeneity of the text also leads to innumerable possibilities of interpretation. This essay aims at analyzing the work from the perspective of ‘Outer Space,’ focusing on the scientific and fantastic elements and the sense of modernity embedded in its content. Science and technology are crucial elements in science fictions, playing a focal part in the reflection of modernity. The first part of this essay will point out that most of the relevant scientific and fantastic elements are experienced by the protagonist of My City, Ah Guo, showing that these elements are so important to express the theme of the novel as well as the metaphor of modernity. Then, from the aspect of “dystopia” and “eschatology,” the essay will explain how My City rewrites and even subverts these two concepts by using different techniques such as parody, dialogues and allusion. Through these rewriting and subversion, the novel brings out a key message of retrieving the hope of the future in the human world. In the Seventies of 20th century, such unique writing components make My City one of the most outstanding novels among Mainland China, Taiwan and Hong Kong. Besides, My City not only addresses the common concern of local consciousness in Hong Kong but also proposes an alternative theme of integration and co-existence through rethinking the new situation of modernity. In the sense of local identity, My City also shows its different angle and “heterogeneity” in Hong Kong literature.