Siping is located in the hinterland of the Songliao Plain in Northeast China, between Shenyang and Changchun, it is the transportation hub connecting the east-west, north-south railways and highways, and it is also the grain distribution center, so it has always been a battleground for soldiers. During the Northeast Liberation War, Siping's strategic position became more prominent. Originally, the Democratic Alliance Army in the Northeast had already occupied Siping, but the good times did not last long because Du Yuming commanded the New First Army and the New Sixth Army to attack in turn, which made the Democratic Alliance Army that planned to win the Siping Defense War pay a heavy price, with more than 10,000 casualties and was driven north of the Songhua River. A year later, the Northeast Democratic Alliance Army, which had emerged from a passive situation, rapidly expanded its occupation zone in a powerful summer counteroffensive. The Kuomintang army was squeezed into a few big cities, while the Northeast Democratic Alliance Army had more than 400,000 troops, and its strength was not what it used to be. In order to completely reverse the situation of the Northeast War and contain the Kuomintang army's attack on Yan'an, Lin Biao, commander-in-chief of the Northeast Democratic Alliance Army, decided to attack Siping. Concentrate the 1st Column, Deng Column (Deng Hua Column) and the 17th Division of the 6th Column, a total of seven divisions, plus five artillery battalions, a total of about 100,000 people, to form the Siping siege force, under the unified command of Li Tianyou and Political Commissar Wan Yi, under the arrangement of the No. 1 chief, it is planned to take Siping!

"What? Want to play four draws? Liu Hai asked in surprise: "Who is in command of the national army?" Bangs asked hurriedly. It is said to be Lieutenant General Chen Mingren of the National Army! Su Huizhen said immediately. Chen Mingren? Broken! "As soon as I heard it, I knew that something big was not good! When attacking Longling, Liu Hai cooperated with Chen Mingren, this person was resourceful, clever and tenacious, and definitely not an ordinary general of the national army. This time it was another attack on the city of Siping, and the Democratic Alliance Army did not have an advantage in firepower, and lacked experience in attacking fortifications, and if one was not careful, he would be beaten with curly hair. "What's wrong? Sea? Su Huizhen looked at her bangs and asked. Hurry, telegraph to the No. 1 chief, you must pay attention to preparing more artillery and *, step by step, don't be in a hurry, and pay attention to reinforcements, Siping City is not so easy to fight, especially under the command of Chen Mingren, this person is so suspicious, be careful! Bangs said hurriedly. Okay, I'm going to let them send a report! "Su Huizhen has never seen bangs so anxious." Forget it, I'll go myself! Bangs got up and ran out.

At this time, Commander Li Tianyou, who attacked Siping, had already begun to attack, and after No. 1 received Liu Hai's telegram, there was no time to change anything! For Liu Hai's suggestion, the No. 1 leader attaches great importance to it, because the last battle of Siping was because of the loss of the traces of the Liu Hai artillery division, so that it successfully rushed to Siping and failed, but the attack has begun, and the only change in the No. 1 leader is to increase the number of reinforcements! Although the preparations are very complete, but still underestimate Chen Mingren's level: Chen Mingren divided Siping into five defense areas, and used the brick houses in Siping City to make full preparations, although the PLA desperately assaulted, using as many * and artillery as possible, but the national army's resistance was tenacious, the shooting was fierce, and the firepower was complete much beyond the expectations of the No. 1 chief! In the battle to attack a small building, a company of one hundred and thirty-five people, full of people, only survived ten people in the end, and the losses were unprecedented! Not only firepower, Chen Mingren also played a handful of bean sprinkling into soldiers, and sprinkled a large number of soybeans on the road of the PLA assault, and all the assault troops who were unstable on their feet fell, and were finally killed by the fierce firepower of Chen Mingren's troops! The huge casualties are still secondary, and the most fatal thing is the reinforcements of the national army! The Kuomintang two armies, the 53rd Army and the 61st Army in Shenyang, have already gone north to reinforce in two ways!

"What's wrong with the sea, is this battle difficult to fight?" Su Huizhen asked. "It's not very difficult to fight, I think it's a must-lose battle! Chen Mingren's 71st Army is a veteran of the Anti-Japanese War, and almost all of the troops are veterans, with good marksmanship, tricky tactics and excellent equipment! In the battle in the southwest, Chen Mingren and us not only knew how to attack the fortification, but also absorbed the experience and lessons of the Japanese perseverance, this battle in the firepower of our people is not at all advantageous, the number of shells is probably not even a fraction of the opponent's, tenacious perseverance, superb defense technology, coupled with superior firepower, the most important thing is Chen Mingren's command, this battle can be a draw on the high incense! Liu Hai said gloomily, "Not only that, but this time our mission is probably not finished!" "What if a miracle happens?" Su Huizhen asked. "War is not magic, in fact, the outcome of every battle has been decided before the war, but I didn't know it at the time!" Liu Hai said: "Let's hurry up and urge those students to learn metallurgical technology as soon as possible!" ”

Similar to what Liu Hai thought, Chen Mingren's troops were very tenacious, he hid in the basement to command, and even the guards were sent out to fight, and they were bound to hold out until the last minute! At this time, the attacking troops also reached the end of the crossbow, and after the desperate attack, they were killed and wounded everywhere. Not only that, but Chen Mingren received full support from the Kuomintang army. The Shenyang side has been using the air force to airdrop ammunition to Siping. Within a few days, 44 planes were dispatched and 88 tons of ammunition were dropped on Siping. Within three days, 136 transport planes were dispatched to drop more than 3 million rounds of ammunition of various kinds, 30,000 rounds, 6,200 mountain artillery shells, 1,300 artillery shells, and 110,000 shells. At the last moment, the attacking PLA was faced with the danger of being annihilated by the enemy, but it still did not hold out in the last few minutes and was forced to retreat! The most important thing is that the PLA offensive troops suffered more than 13,000 casualties, and several divisions were beaten into empty shells.

The defeat in the Battle of Siping greatly increased the confidence of the Kuomintang, and at the same time made Stalin, who was far away in Moscow, even more hesitant! What Stalin hesitated was not a few machines but the question of support for the Chinese Communist Party, and if the Kuomintang really won in the end, then China would be completely lost, and it would become the sphere of influence of the United States! After some consideration, Stalin ordered the Far Eastern Military District to suspend support for the Northeast Liberation Army! Although Stalin ordered the cessation of aid, the limited support for ammunition and fuel continued, except that large weapons such as artillery and tanks were no longer provided, and the most basic ammunition was still supported! For Liu Hai's request to buy a complete set of cannon manufacturing machines, he refused on the grounds of technical reasons! Liu Hai and Su Huizhen had nothing to do about the attitude of the Soviets who changed according to the situation, but fortunately, the support in terms of the training value of technicians did not stop, and the trainees led by Liu Hai could continue to train in Vladivostok!

"Dear Liu, I feel very helpless about the orders of the great Comrade Stalin, I'm sorry I can't help anything!" After a month of drinking, Otrov became very familiar with the bangs, and expressed his helplessness about Stalin's latest order! "It doesn't matter Comrade Otrov, you have helped us train metallurgical technicians, and we are very grateful!" Bangs said. "Dear Liu, although I cannot change Comrade Stalin's order, I can give you a gift, and I don't think this gift will help you a little!" Comrade Otrov said mysteriously. "Oh? What gift? Bangs asked with great interest. This gift is a medium carbon alloy! Outrov said. Medium carbon alloy! Bangs said excitedly, "Really? ”

"Medium carbon alloy is a special kind of steel, it is very light, if you can make it, you can use it to make shells to reduce the thickness of the cannon cartridge, increase the * and the warhead charge, that is to say, it can make your low pressure guns fire the range and power of high pressure guns!" Outrov said. "I've heard of it, but I don't know very well!" Bangs said. "Hehe, in fact, it's not mysterious at all, it's just that several trace elements and rare metals are added to the molten steel, which increases his strength several times, but the weight is reduced a lot, do you understand?" Outrov said. "I already understand Comrade Otrov, but there should still be technical difficulties in the process of smelting!" Bangs said. "Hehe, dear Liu, science is sometimes very simple, there is no technical difficulty in smelting this kind of steel, as long as you can keep stirring when practicing, so that a small amount of air between the elements and steel molecules can be evaporated by high temperature, as long as you do this, it will be considered a success!" "Thank you, Otrov!" Bangs said with some gratitude.

"In addition to this medium-carbon alloy, there is one more thing to tell you, and that is the manufacture of nickel-copper alloys, with which you can cut a lot of steel to make shells!" Otrov said as he walked into his office. "But these things are easier said than done!" Bangs' brow is still furrowed. "I've been drinking too much lately, and I made a few more copies last time when I made these copies, and I accidentally lost them again!" After Otrov finished speaking, after the bangs were taken, it turned out to be the manufacturing process and addition ratio of medium carbon alloy! Maybe this thing in the USSR can really be lost by getting drunk! But it is simply a good thing for China, and after Liu Hai took it, he said to Otrov with a smile: "Although Comrade Stalin did not agree, our friendship is still of great help, and we will remember it!" "No, no, no, you'd better say you picked it up, so I won't be in trouble!" Outrov said. "We'll remember you!" Bangs said gratefully.