On December 5th, a trip by Russian President Putin drew attention from the outside world. On that day, Putin personally went to the Crimean Bridge, which was hit by an explosion two months ago, to listen to a report on the progress of the repair. At the same time, two "military bases" in Russia were suddenly attacked by Ukrainian drones, and the Russian side carried out a "large-scale" attack on Ukraine, posing a growing threat to the situation between Russia and Ukraine... Putin personally drove to inspect the Crimean Bridge on December 5th and drove across the bridge. In addition to the Russian satellite news agency, several Western media outlets such as the Associated Press and Bloomberg also reported on Putin's visit. Russian Deputy Prime Minister Husnulin reported to Putin on the progress of the bridge maintenance work. Putin once parked his car at the location of the explosion on October 8th and got off to discuss the repair of the bridge. According to Russian officials, all structural assemblies are carried out at the repair site. A total of 500 people and approximately 21 pieces of equipment participated in the repair work. Even during the storm, the Russian side carried out all-weather repairs. The Crimean Bridge, which is 19 kilometers long and connects southern Russia with the Crimean Peninsula, is the flagship project of Russian President Putin. After completion, it was unveiled by Putin on May 15, 2018. On October 8th, two months ago, a truck exploded on the Crimean Bridge, causing a 7-car oil tanker on a freight train to catch fire and burn, and damaging some sections of the highway bridge. The official website of the Russian Federal Security Agency reported that the organizers of the attack were the intelligence agency of the Ukrainian Ministry of Defense, the head of the agency, and relevant special agents. On the day of Putin's inspection of the Crimean Bridge at two "military bases" in Russia, Ukraine launched a surprise attack. Several foreign media outlets, including the Associated Press, quoted the Kremlin as saying that Ukrainian drones launched attacks on two "air bases" in the Saratov and Ryazan regions of Russia, causing at least three deaths and multiple injuries. According to NBC, the Engels Air Force Base near the southwestern Russian city of Saratov has Tu-95 and Tu-160 strategic bombers capable of carrying nuclear warheads. The base in Liangzan area is equipped with remote aerial refueling aircraft, which can refuel aerial bombers. The Associated Press reported that the unprecedented attack in Russia may lead to a serious escalation of the crisis in Ukraine. NBC also stated that the attack may indicate that the base equipment has new capabilities to launch attacks far from the front line. In this regard, "Russia Today" reported that Ukrainian drones attacked Russia's airports in Saratov and Ryazan regions. Both of these places are located over 500 kilometers within Russian territory. The Russian Ministry of Defense stated that drone debris shot down by air defense systems hit related facilities, resulting in the death of three soldiers and four injuries. It is reported that two planes were slightly damaged. TASS news agency also reported that Kremlin spokesperson Peskov told reporters on the 5th that reports on facility accidents in Saratov and Liangzan regions have been submitted to Russian President Putin. As Russia launches a "large-scale" attack on Ukraine, it continues to launch attacks in multiple parts of Ukraine. According to the "Russia Today" report, the Russian Ministry of Defense said on December 5 that Russia had carried out a "large-scale" attack with strategic bombers to prevent the weapons, equipment and ammunition provided by the Ukrainian army and the West from being transported to the front by railway. The Russian Ministry of Defense also stated that "all 17 designated targets have been hit." The report quoted Ukrainian officials as saying that power supply in the Ukrainian capital and multiple regions has been interrupted. Among them, there was a comprehensive power outage in the Sumi region, with partial power outages in places such as Cherkashi and Kharkiv. Dnipropetrovsk also had multiple targets attacked. The damage to the power grid has seriously delayed railway transportation across Ukraine. The report also pointed out that after the Ukrainian attack destroyed the Crimean Bridge, Russia began attacking infrastructure targets in Ukraine. Putin also told German Chancellor Scholz last week that although Russia has long avoided targeting certain targets, such strikes have become "necessary and inevitable" in response to Ukraine's provocative attacks on Russian civilian infrastructure. (Lai Xin She)