Retrieval results of the optical-to-NIR spectra of TrES-4b. The results from the equilibrium chemistry model and the free chemistry model are shown in the upper and the lower panels, respectively. The orange line and the shaded areas indicate the posteriors distribution of the retrieved spectra. The yellow dots correspond to the models rebinned to the data passbands. The median offsets of the NIR spectra are -246 ppm in the upper panel and -430 ppm in the lower panel.