China launches relay satellite to the far side of the moon

The video discusses the launch of the Tricho satellite on a Long March 4C rocket from China. Tricho will orbit the second Lagrangian point, becoming the first communication satellite in this orbit. Its primary function is to facilitate communication between Chinese Mission Control and the upcoming Changa mission to the moon's dark side. Additionally, Tricho carries the Netherlands China Low Frequency Explorer, a radio scanner designed to detect ancient radio signals from the early universe.

How is the Tricho satellite expected to communicate with the Chinese Mission Control?

What ancient signals is the Explorer searching for?