  We report the creation of dual-species Bose-Einstein condensates (BECs) of
$^{7}$Li and $^{133}$Cs. These BECs are formed in a bichromatic optical dipole
trap created with 1550-nm and 780-nm laser beams. During the production
process, an external magnetic field of 886~G is applied to adjust the
scattering lengths to $a_{\rm{Cs}} = 123a_0$, $a_{\rm{Li}} = 484a_0$, and
$a_{\rm{LiCs}} = 248a_0$. These scattering lengths allow for efficient
evaporation and sympathetic cooling. The dual-species BECs are typically
produced with $1.5\times 10^4$ Cs atoms and $6.0\times 10^3$ Li atoms. This
quantum degenerate mixture of Li and Cs provides an ideal platform for
exploring phenomena such as polarons and Efimov trimers, as well as for
creating ground-state LiCs molecules.
