The alternative to RD-93MA engine, even though Chinese engine has been a disappointment but here is a timeline to WS-13 or WS-13a
WS-13 and work out a detail development scheme.
from chinese Fora:
2001 Project started
2002 Confirmed solutions and responsible division
2003 Aug Engine core component design completed
2004 Jun Core component design was reviewed & approved by experts
2005 Jan Whole engine design drawings and technical documents completed
2005 Oct China Aviation Industry Corporation I officially approved the engine development
2006 First prototype completed
2008 Ground testings finished
2009 Flight testings on test plane finished
2010 18 Mar"Taishan" engine (WS-13) fitted on FC-1(JF-17), first roll success
18 Apr FC-1, fitted with "Taishan" engine, finished maiden flight
2011-2012 Flight tests
2012 Aug Long-run durability test started
2013 Started design finalization processes
2014 According to schedule, design finalization will be completed
2015 Final completion tests for mass production
2016 Schedule to start mass production