Industrial space is widely considered as a fundamental component of urban structure and has been significantly affected by the transitional process in China since the late 1970s.This study investigates the restructuring trajectories and underlying factors of manufacturing firms in Nanjing to detect intra-urban dynamical trajectories and spatial patterns.The result implies that Nanjing has witnessed significant suburbanization of manufacturing with the successive exit of old firms and gradual emerging of specialized areas in the peripheral suburbs.In particular,the development zones (DZs) has become the major base of the new or relocated firms and consequently changed the urban spatial patterns from a monocentric one toward a polycentric point-axis pattern.Employing the binary logistic regression (BLR) and spatial lag/error models (SLM/SEM),the study has found that the triple process of marketization,globalization and decentralization,coupled with the new-type urbanization,has a significant influence on the restructuring of manufacturing spaces in urban China through the price mechanism,production networks,policy reforms,and environmental changes respectively.In addition,the field work survey and in-depth interviews in the old city center show that though the market has played an increasing important role in driving old firms to migrate from the city center and attracting new firms to concentrate in those planned area in the suburbs,preferential policies and advanced facilities constructed by local governments are still the main reason why firms concentrated in various DZs.