This study applies the partnership quality theory to investigate how the perceived information sharing quality from express delivery service providers can affect logistics service performance for online shoppers in terms of partnership quality (including trust and commitment) and willingness to share information from E-commerce enterprises. Based on 421 samples of E-commerce enterprises in China, the results of structural equation modelling revealed that perceived information sharing quality affects partnership trust, which in turn affects the partnership commitment and willingness to share information. Partnership quality and willingness to share information affect the perceived performance of the express delivery services. Surprisingly, information sharing quality does not play a role in commitment. This study provides a theoretical contribution to E-commerce supply chain research in constructing a cognition, affective, behavior, and conative performance model for further research.