  We investigate the potential of the next generation long-baseline neutrino
experiments DUNE and T2HK as well as the upcoming reactor experiment JUNO to
constrain Non-Standard Interaction (NSI) parameters. JUNO is going to provide
the most precise measurements of solar neutrino oscillation parameters as well
as determining the neutrino mass ordering. We study how the results of JUNO
combined with those of long-baseline neutrino experiments such as DUNE and T2HK
can help to determine oscillation parameters and to constrain NSI parameters.
We present excluded regions in NSI parameter space, $\epsilon_{\alpha \beta}$
assuming Standard Model (SM) as the null hypothesis. We further explore the
correlations between the NSI parameters and CP-violation phase.
