This paper analyses two films, “Mangjong” and “Hyzagar” directed by Zhang Lu based in China from the point of view of nostalgia and trauma in the diaspora communities. It sheds light on the fact that nostalgia of the diaspora is closely connected with the instinct for homing into their birthplace and obsession over their root. In addition, it pictures in detail the way the diaspora perceive trauma in their heart and how they lead a living to cast off the yoke of trauma. The heroine of “Mangjong”, Shun-hi who fails to overcome the exclusion and discrimination, decides to revenge. For her the “killing” of a Chinese, the very source of discrimination, is the event that allows her to find her true self. Unlike Shun-hi of “Mangjong”, the heroine of “Hyzagar” chooses to “leave” again the desolate desert of Mongolia where persistently resists her settlement. She represents the path of troubling life of a permanent alien. The paper suggests three codes to read the attitude and deed of the two heroines, Shun-hi: Firstly, using the “language” code it discloses obsession over her birth's place; Secondly, reading the “body” code it shows the foundation of existence and the methods of communication of the diaspora; Lastly, through the “way” code it reveals the reinvention of her hometown and the way for future. In conclusion, this paper pursues how the diaspora crosses over the boundaries to get to their true destination, tolerance.