The main radar on the Liaoning is the Type 346 from the Type 052C. There is some speculation, and a reasonable one, that the C-band array is removed to increase the number of elements for the S-band array, which can improve range, the C-band mainly there in the radar for HHQ-9 targeting, which the ship doesn't use and has become redundant. As an AESA, Type 346 itself is a big jump from the PESA panel used on the original Kuznetsov class carrier. If one thinks about it, the Liaoning is the perhaps the first carrier in the world to have an AESA. The first US carrier to have an AESA is the first member of the Ford class. Outside of that, the Queen Elizabeth class has the Type 997 Artisan radar.
The main radar on the second carrier is either the Type 346A from the 052D or the Type 346B from the 055. Again, its possible that the C-band may have been removed for more S-band elements for greater range.
Both ships are supplemented by the Type 382 Sea Eagle from the Type 054A frigate. While the Type 346 is meant for ranged search, the height the Type 382 is placed is meant to peer down and extend the radar horizon, which is useful to catch sea skimmers early. It also adds S-band search radar redundancy. As both Type 346 and Type 382 are mainly S-band radars, its possible that during use, one set is searching at the longer spectrum of the S-band while the other is searching at the shorter spectrum. The original Kuznetsov class carrier uses the similar FREGAT MR710 radar on this same position.
