  After a brief review of the quark-based model for nuclear matter, and some
pion properties in medium presented in our previous works, we report new
results for the pion valence wave function as well as the valence distribution
amplitude in medium, which are presented in our recent article. We find that
both the in-medium pion valence distribution and the in-medium pion valence
wave function, are substantially modified at normal nuclear matter density, due
to the reduction in the pion decay constant.
