Planetary (minimum) mass-period diagram for the updated HS19 sample (HS19 TG, HS19 TS, and HS19 RV), the TESS HJ sample (TESS), and hot Jupiters newly discovered by ground-based transit (New TG). Ultrahot Jupiters are defined as those with orbital period P_orb < 2 days and planetary (minimum) mass ﹩0.3\lt {M}_{{\rm{p}}}(\sin i)\lt 13\,{M}_{{\rm{J}}}﹩, as indicated by the red dashed box. The ultrahot Jupiters used in our analysis in Section 4 are marked out by bold red edges.