In the early morning of February 7, Kyiv and other places were attacked by large-scale missile and drone attacks by the Russian army, killing at least 5 civilians and injuring 48 people, including 4 deaths in Kyiv alone. According to the statistics of the Ukrainian air defense forces, the Russian army launched a total of 44 missiles and 20 Witness suicide drones in this attack, and the Ukrainian army intercepted 29 missiles and 15 drones. 
Among them, 26 of the 29 Kh-101 cruise missiles intercepted by the Ukrainian army, 3 "Caliber" cruise missiles were all intercepted, and the Russian army also issued **4 Kh-22 cruise missiles, 3 Iskander-M and 5 S-300 anti-aircraft missiles.
In general, the interception rate of Ukrainian missiles is much lower than before, and drones are no longer able to reach 100% interception rate. 
This may be because the Ukrainian army uses electronic warfare systems to interfere with the normal trajectory of missiles, in addition, the Russian army launches missile drones from multiple angles and directions, and most places in Ukraine do not have a high-density air defense network like Kyiv.
This round of missile strikes by the Russian army rushed to Ukrainian defense facilities, among them, near the Kharkiv Malyshev tank plant was hit. An airfield in Ivano-Frankivsk, where Ukrainian F-16s are stationed, is rumored to have been hit by missiles, and the marine shipyard in Nikolaev was also hit by drones.
In Izhevsk, the capital of the Russian Udmurt Republic, west of the Ural Mountains, where Topol-M intercontinental missiles and Iskander ballistic missiles are produced, a large ** was reported by local residents, and huge pillars of fire could be seen several kilometers from the scene. However, according to the current range of Ukrainian drones, it is still quite difficult to reach the region, and some analysts believe that ** is related to the testing of rocket engines. 
Of course, it cannot be ruled out that Ukraine launched drones deep into the territory of Russia.
And now, the targets attacked by Ukrainian drones in Russia are, first, Russian energy facilities, and the other is Russian missile production plants. The intentions of these two are obvious, one is to relieve Russia's long-term war potential, and the other is to reduce the pressure on Ukraine's air defense and reduce Russia's ability to launch missiles.
Russia's oil refining fell to its lowest level in nearly two months due to Ukrainian drone attacks: two large refineries with an annual output of 10 million tons were shut down (Russia has a total of 10 refineries with similar capacity, and in just one month, two were attacked), resulting in a 13% drop in Russian daily processing compared to December last year50,000 barrels.
The Russian Ministry of Energy had to admit that gasoline and diesel exports fell by 37% and 23%, respectively, as a result of the Ukrainian attack. As OSINT researcher Stanimyr Dobrev noted, Russian gasoline production fell by 2% after a drone attack on the Novgorsk oil refinery in Volgograd.
However, compared with the shrinking processing capacity, Russian gas exports also continue to decline. Speaking to the Russian Federation Council on February 6, Russian Deputy Prime Minister Alexander Novak said that in 2023, Russian pipeline gas exports will be 99.6 billion cubic meters, down 299%。