After a March Visa bulletin that saw the Chinese Final Action Date make a dramatic leap forward of 165 days from the previous date, the April chart has China remaining at May 15, 2015. India makes the biggest advancement this time moving 10 weeks to January 1, 2019 (previously October 22, 2018), and Vietnam moves forward to February 8, 2017 (previously January 15, 2017).
See the April Visa Bulletin