Image from timeanddate.com

During the meeting between Putin and Xi Jin Ping in Moscow, Ceres is in opposition to the Sun and it will be visible all night. At the same time, Ceres makes its closest approach to the Earth (perigee) and appears at its brightest. But the orbit of Ceres being so far out, its brightness does not vary much.

The dwarf planet Ceres (like Pluto) is the largest object in the asteroid belt between Mars and Jupiter, and it's the only dwarf planet located in the inner solar system. It was the first member of the asteroid belt to be discovered when Giuseppe Piazzi spotted it in 1801. (Wikipedia)

Ceres had the power to fertilize, multiply and fructify plant and animal seed, and her laws and rites protected all activities of the agricultural cycle. Being the goddess of agriculture, grain crops, fertility and motherly relationships, I would not be surprised if part of their discussion centered around food and crops for their respective countries.
The spring Equinox in opposition to Ceres also tells us that this will be a major concern this year in the world.

Accompanied by Venus as an Evening Star conjunct the North Node and visible in Moscow, sinking 3 hours 27 minutes after the Sun, no surprise that they can reach an agreement.