Starting from 2013, Lahem focused his lens on his relationship with his hometown and created several projects that Joanna Fu, curator of Modernity's Fracture: The Odyssey of Returning Hometown, Lahem's winning exhibition at Jimei x Arles, termed as a Hometown Trilogy that comprises Lost, Return to Hometown, and Luo Fuping.

In the Lost series, Lahem draws a parallel between himself and the image of grass uprooted from its natural soil and then placed on concrete. Through this metaphor, he explores his connection and memories associated with Sibei and his family.