In the following days, Song Zhewu plunged into the Institute of Chemical Industry and worked with Wang Mingyang and his students to start dichlorodifluoromethane.

Dichlorodifluoromethane is one of the most widely used freon refrigerants, mainly used in small and medium-sized food depots, household refrigerators, and refrigeration devices such as water and road refrigerated transportation. Dichlorodifluoromethane has good thermodynamic energy, low refrigeration pressure, and the air-cooled or natural condensation pressure is about 0.8-1.2kpa. It has a standard evaporation temperature of -29 °C, which is a medium-temperature refrigerant, and can be used in small and medium-sized piston compressors to obtain a low temperature of -70 °C. For large centrifugal compressors, a low temperature of -80°C can be obtained.

Although the production equipment has been made and purchased by Song Zhewen abroad, because Song Zhewu is unwilling to spend more money, he has to wait until the fourth quarter when the global economic crisis breaks out to buy it at a low price, so now he has to make his own simple equipment for temporary application.

The other equipment is easy to manage, nothing more than pipelines and mixing rooms, the technical requirements of these facilities and equipment are not very high, and there is no difficulty in making. But the most important reaction tower made Song Zhewu very troubled, although his pressure was not very high, but the reaction tower had very strict requirements for airtight surnames, and Song Zhewu did not have an integrated reaction tank, so he had to make it himself with white iron sheet, tried many times, and finally made a barely usable one.

Fortunately, Song Zhewu's need for refrigerators and air conditioners is not urgent, and soon there will be an economic crisis in Europe and the United States. Now only a small amount of dichlorodifluoromethane needs to be produced, which is enough for Li Minghua's electronics institute to make refrigerators and air conditioners.

Just finished making dichlorodifluoromethane, and before Song Zhewu could catch his breath, Xiao Guodong sent someone to find him and asked him to return to the headquarters immediately.

It turned out that Ge Guangting, the representative of Zhang Xueliang in the northeast, came. Ge Guangting wanted to go to Taiyuan, Shanxi, but he did not go to Taiyuan via the Zhengtai Railway, but instead took a detour to Baoding to the north and entered Shanxi from Lingqiu through Laiyuan.

Ge Guangting visited Song Zhewu in Laiyuan and handed over a letter from Zhang Xueliang.

Ge Guangting's arrival made Song Zhewu a little strange, he didn't have any contact with Zhang Xueliang, the commander of the Northeast Frontier Commander, could it be that this young marshal also wanted to take advantage of the chaos to intervene in the customs at this time? At this time, Ge Guangting went to Shanxi, and it was difficult to guarantee that the young marshal did not have this mind.

With a stomach full of questions, Song Zhewu opened Zhang Xueliang's letter. This sight frightened Song Zhewu, and he couldn't help but secretly curse himself for being confused, how could he forget such an important matter! Although Zhang Xueliang's letter shocked Song Zhewu's heart, he still tried his best to stay calm and warmly asked Ge Guangting to rest first.

Although Ge Guangting was a little speechless, he still followed the guards to rest.

As soon as Ge Guangting left, Song Zhewu handed Zhang Xueliang's letter to Xiao Guodong, and immediately asked Liang Bi to inform Tao Rong, Wang Xu, and Li Wentian to go to the headquarters for an emergency meeting.

The content of Zhang Xueliang's letter was to the effect that Song Zhewu was told. On May 27, Mi Chunlin, chief of police in the Harbin Special Administrative Region, received a secret report that the Soviet Union would hold a meeting of Far Eastern Party members at the Harbin Consulate. With the approval of the Chief Executive of the Hong Kong Special Administrative Region, Michael's team searched the consulate, arresting 39 people in the basement and seizing a large number of documents. Among the materials found in the Soviet consulate in Harbin, there were ...... of sabotage of China's reunification Propaganda of redness, evidence of fueling civil unrest. Among those arrested was the Soviet Consul General in Shenyang, Kuznetsov. On 10 July, the Office of the Commander of the Northeast Frontier Defense ordered the expulsion of 59 Soviet directors, including the director and deputy director of the Eastern Railway Administration, and at the same time sealed up the relevant units of the Soviet side. ’

In his letter, Zhang Xueliang also said: "On July 13, 1929, the Soviet diplomatic authorities expressed a strong protest and on July 18, 1929, declared that they had broken off diplomatic relations with China. On 6 August, the Revolutionary Military Council of the Soviet Union issued an order to form a special army group in the Far East in order to cooperate with the Soviet Amur (Heilongjiang) Fleet in fighting against the Chinese [***] team, and to re-appoint Bryuhel (General Galen), who was familiar with the situation in China and had served as a military adviser to the political axe of Guangdong during the period of cooperation between the Kuomintang and the Communist Party, as the commander of the group army, with its headquarters in Khabarovsk (Boli). On 13 August, two Soviet warships, 300 marines, and two planes invaded Suidong County, Heilongjiang Province. ’

At the end of his letter, Zhang Xueliang wrote: "In view of the above-mentioned bad situation, Soviet Russia's invasion of China's three eastern provinces will not be long in coming. Once the Soviet Union invades, although the soldiers of our northeastern frontier are brave enough to fight into battle, their weapons are unfavorable and they will not be able to hold it. Xueliang can't bear the loss of my Chinese land, and the people are enslaved by foreigners, and they will fight to the death. Xueliang's honor and disgrace are small, and the loss of power and humiliation of the country are big! Without foreign aid, the three northeastern provinces would have been trampled on by Soviet Russia. In this way, even if Xueliang died, he could not be exempted from his crimes, and there was no shame to see the ancestors under the nine springs! Xueliang looked west at Guanzhong, although his eyes were full of millions of soldiers, but there was no one to help Xueliang. For more than a month, Xueliang is like a cuckoo crying blood, tossing and turning, unable to sleep at night, thinking again and again, and solving the difficulties in the Northeast is only my brother. With the 30 million compatriots in the Northeast as the mind, and the land of thousands of miles of white mountains and black waters, I hope that my brother will help each other! ”

The payment is "Xueliang weeps blood and waits for it".

After Xiao Guodong read the letter to Tao Rong, Wang Xu, and Li Wentian, Tao Rong, Wang Xu, and Li Wentian had different expressions. Although Tao Rong was surprised, she frowned and thought about something, but did not speak; Wang Xu's face flushed excitedly, but he stared at Song Zhewu silently; Li Wentian slapped the table and stood up, and said loudly hatefully: "Lao Maozi is too bullying, not only does it want to plot against our Xinjiang Province and Outer Mongolia as the commander said, but it also wants to do something to the Northeast!" Commander, let me lead the team to the Northeast. ”

"Canxuan, don't get excited, sit down and talk." Xiao Guodong said in harmony.

Li Wentian exhaled heavily and sat down.

Xiao Guodong said to Li Wentian: "Canxuan, the Northeast Army is the best equipped in the country, not only do they have planes, tanks, and warships, but they also have more cannons and machine guns than our Fourth Route Army, and their personnel are conservatively estimated to be 400,000. If they can't beat Lao Maozi, how many people do you say we are going to go to support them. ”

Song Zhewu knew that what Xiao Guodong said was true, the Northeast Army was indeed the best equipped unit in China today, Song Zhewu had read the information about the Northeast Army in his previous life, and he couldn't remember it clearly after a long time, but there were a few numbers that he was deeply imprinted in his mind. At the time of the Middle East Road incident, it had not only dozens of warships, but also the largest cruisers in the country; There are more than 300 aircraft, including 230 fighters; The production of the Mukden Arsenal was very large, and it was said that the output of light and heavy machine guns, mortars, and rifles could equip a battalion in a day.

There are even more worrying figures, "Nine. 18. At the time of the incident, a large number of official and private property was plundered. According to incomplete statistics, the loss of official property alone has reached more than 1.8 billion yuan. The loss of ordnance and ammunition was even more serious, with 262 aircraft, 3,019 mortars and cannons of various calibers, 26 combat vehicles, 5,864 machine guns of various types, 118206 rifles and pistols of various kinds, as well as a large number of guns and ammunition, clothing, and food and straw.

From the above figures, it can be seen that the strength of the Northeast Army is definitely the strongest among all forces in China, not only in terms of weapons and equipment, but also in terms of financial resources and not much inferior to the Nanjing political axe.

Although the strength of the Northeast Army is strong, it is still far behind if it is compared with a big country like the Soviet Union, and if the Soviet Army enters the interior, the Northeast Army will still have the possibility of winning the war by virtue of its geographical advantages. However, in Song Zhewu's memory, the Soviet army was basically on the border around Manchuria and did not enter the interior.

Li Wentian muttered in a low voice dissatisfied: "Then we just watch Lao Maozi beat us Chinese?" ”

After the initial shock, Song Zhewu already had an idea at this time, after careful consideration, although he did not know the cause of the Middle East Road, but he knew that the Soviet army used more than 80,000 troops in the Middle East Road incident. Judging from the weapons and equipment of the Northeast Army and the military quality of the soldiers, they are by no means the opponent of the Soviet Army. Even with his Fourth Route Army, if he fought a positional battle with the Soviet army, he would also suffer heavy casualties without air cover. However, it is not okay to ignore Zhang Xueliang's request, then not only Zhang Xueliang will blame him, but even his own conscience will be disturbed, after all, this is a war against a foreign enemy. If you take this opportunity......

Song Zhewu, who had made up his mind, stood up and said while lighting a cigarette: "We must take care of it, but we must first figure out the cause of the 'Middle Road Incident' and see what the Russians want to achieve?" It's up to us to make a decision. ”

"Yes, I agree with the commander, we must find out the intentions of the Russians before we can decide how to help Zhang Xueliang." Tao Rong first expressed his support for Song Zhewu.

Xiao Guodong looked at Song Zhewu and said: "Wen Ge, there is no news about the Northeast in Nanjing these days, and even the Soviet Union has not heard of the severance of diplomatic relations with us. ”

Xiao Guodong's words made Tao Rong, Li Wentian, and Wang Xu all stunned. Oh, yes! There is such a big thing as breaking off diplomatic relations, so there will be no movement at all? This is the severance of diplomatic relations with the Soviet Union, a big country in the north! Is there something wrong with this?

Tao Rong said with a question on his face: "Commander, should we ask this representative of Zhang Xueliang, he should know the ins and outs of the matter very well." ”

Although Song Zhewu knew that the 'Middle East Road Incident' was true, there was no news about the severance of diplomatic relations between the Soviet Union and the Republic of China, whether it was the political axe or the people, which made him feel very strange.

Song Zhewu nodded and said, "Okay, call Ge Guangting to the reception room, and we'll ask clearly." ”

(To be continued)