Beijing formerly had a strong tradition of cycling that exceeded many other Chinese cities in both ownership and ridership. Over the past two decades, however, this tradition has been on a shrinking path. During the mid-1980s, when China was called the "Kingdom of Bicycle", Beijing had a biking population of over eight million, with 62.7% of lal trips being made by bicycle By 2000, despite bicycle ownership remaining high, only 38.7% of all trips were made by bicycle, this number dropping even lower to 16.7% of all trips in 2010. What werer the factors that made cycling so popular in the past and what deters it currently? Through a historical review and an analysis of the national and lcoal statistical data, my research aims to (1) provide an overview of cycling history in Beijing; (2) identify and analyze the major factors which have influenced bicycle use in different periods; and (3) propose policy recommendations based on the improved understanding about determinants of bicycle use in Beijing