This paper employs Autoregressive Distributed Lag (ARDL) models and monetary base growth to construct an exogenous and comprehensive monetary policy measure in China, where various monetary policy instruments co-exist, and the operational and intermediate targets are changing over time. Our methodology relies on the market equilibrium relationship instead of ad hoc policy rules and strict identiffcation assumptions, hence is robust to monetary policy frameworks in any economy. The empirical results show that the active monetary base growth (AMBG ) constructed via the ARDL models is an excellent description of the behavior of People’s Banks of China across time, and generates impacts on macro variables consistent with implications of macro theory when used in VAR analyses.