“…Third, from public sector's perspective, as selecting partners directly influences the PPP project performance (Song and Xu, 2011;Ouenniche at al., 2016), the public sector will make some requirements about the partner, such as firm size, project experience, financial capacity, and commitment (Farquharson et al, 2011;Boussabaine, 2014;Zhang, 2005b), so as to choose the right partner for service provision. Finally, in terms of how to attract or promote private participation, previous research has also provided some attractive conditions, such as project profitability or stable cash flows (Koppenjan and Enserink, 2009;Panayiotou and Medda, 2014), long-term commitments (Akhmouch and Kauffmann, 2013), quality of institutions (Percoco, 2014), and fair risks allocation (Tecco, 2008), which increase the likelihood of private participation in infrastructure projects. Above all, various studies have provided important insights about partners' attraction and selection, which contributed a lot to public sectors in setting up boundaries for private participation.…”