“…Existing studies point out that integrity of the contract (Lu, Zhang, and Zhang 2016), clarity of the contract terms (Ning 2018), trust (Lu et al 2015b), uncertainty (You et al 2018;Lu et al 2015b;Wang et al 2013), complexity (Lu et al 2015b), asset specificity (Shi et al 2018;Wang et al 2013) and risk perception (Zhang and Qian 2017) have an impact on the opportunistic behavior of contractors. In addition, some studies also prove that the control, adaptation and coordination functions of the contract (Quanji, Zhang, and Wang 2016;Wang et al 2017), Contract Flexibility (Song et al 2018), risk sharing (Zhang et al 2016;Xu et al 2018), trust (Kadefors 2004;Xu et al 2018) and fairness (Lu, Li, and Wang 2017) have positive effects on the contractor's cooperative behavior. However, under the TCE theory, research on the contractors' behavior focuses on the influence of governance, which is at the project level (Li et al 2019).…”