The 47th Session of the UNCITRAL finalized the draft Convention on Transparency in Treaty-based Investor-State Arbitration. It aims to provide a mechanism to allow the UNCITRAL Rules on Transparency to be applied to investment dispute arbitrations mandated by investment treaties concluded before April 1, 2014. This paper intends to examine these UNCITRAL Rules on Transparency and the draft Convention on Transparency. It is particularly in contrast with the relevant rules in the NAFTA, the U.S. Model BIT 2012 and the ICSID Rules 2006, to see if transparency can be enhanced in treaty-based investor-State arbitrations and to extrapolate the implications of the Rules on Transparency and the draft Convention for China’s strategy in BIT or FTA negotiations amid the trendy advancement of transparency standards.