At the Threshold of an Era (Chinese: ???) was a Hong Kong epic drama series broadcast by TVB Jade Channel from October 11, 1999 to December 18, 1999 and March 13, 2000 to May 26, 2000, and was extensively promoted by TVB as its cross-milliennium, one-hundred-episode-long epic. The series composed of two parts, with a gap in between the airing.The entire series took place in a continuing flashback, with one of the main characters pondering the trials and tribulations he went through while riding on a train in the "green city" he developed.The drama documents the rise and fall of three entrepreneurs, who founded Lik Tien Century Construction (????) together to achieve the ultimate goal of developing a pollution-free city in Hong Kong. Vendetta and love serves as strong subplots throughout the series, with the vendetta between two families being the most prominent.The stories covered a span of 20 years, from 1990 to 2010, and featured many technologies that came to age during this time, including the nascent internet, and a bulkier tamaguchi virtual pet device (shown as a device similar to Game Boy in the series), which was developed by one of the entrepreneurs before his entry into construction.