The enhancements of D_s/D^0 and Lambda_c/D^0 ratios in heavy-ion collisions as recently measured at RHIC and the LHC have posed formidable challenges for
theoretical models. We address these puzzles by developing a theoretically
controlled hadronization framework of heavy quarks that conserves 4-momentum and
recovers thermal and chemical equilibrium limits . In particular, we implement
space-momentum correlations of charm quarks with flowing partons as a genuine
consequence of a hydrodynamic background (but elusive in most coalescence models
to date), and an improved charm hadro-chemistry  that incorporates additional
charm hadrons beyond the current listings by the PDG but predicted by the
relativistic quark model and lattice QCD. We show that the charm-hadron data at
RHIC and the LHC can be fairly well accounted for by our strong-coupling
framework of heavy-flavor transport and hadronization, within current theoretical
. Min He and Ralf Rapp, arXiv: 1906.00035 [nucl-th].
. Min He and Ralf Rapp, Phys. Lett. B795, 117 (2019).