At the Threshold of an Era (Chinese: 創世紀) was a Hong Kong epic drama series broadcast by TVB Jade Channel from 11 October to 18 December 1999 and 13 March to 26 May 2000 and was extensively promoted by TVB as its cross-millennium, one-hundred-episode-long epic. The series composed of two parts, with a gap in between airing. The entire series took place in a continuing flashback, with the protagonist, Tim Yip (Gallen Lo), pondering the trials and tribulations he went through while riding on a train in the "green city" he developed.