When Gao Junshan's huge fleet arrived on Hainan Island, it was already the third day of October.

The Second Fleet is stationed here on Hainan Island, and Li Shiqi is the commander of the Second Fleet; this time, when Li Shiqi returned to Hainan Island with the "Zheng He No. 1," he returned to his post and did not continue sailing with Gao Junshan, who gave Li Shiqi the task of defending the security of Hainan Island and creating a favorable environment for the development of Hainan Island.

Gao Junshan has high expectations for the development of Hainan Island, and he believes that as long as the policy is good, a large number of developers will be ushered in.

He has already telegraphed Bailisha to invest funds in the construction of Hainan Island, especially to develop the cultivation of rubber trees.

After the rubber trees on Hainan Island reach a certain scale, he will transplant them to Donghu to plant, and the eggs are safest in two baskets, in case of storms, they can also ensure the harvest in another place, and besides, the climate of the South Seas is more suitable for the growth of rubber trees, if the rubber trees are promoted to the countries of the South Seas, the yield will definitely be greatly improved.

With the increasing development of science and technology, the demand for rubber will be greater and greater in the future. Gao Junshan had already thought about it, and when the car had not yet been developed, he was ready to open a bicycle factory, produce a large number of bicycles to equip the troops, and set up a rapid reaction force.

The technical strength of the production of bicycles has been equipped, and the key problem is still the problem of technology and materials, and now the Academy of Science and Technology is tackling key problems in this direction.

Due to the emergence of rubber, the first batch of rubber shoes has been produced, this batch of rubber shoes was first equipped with the 101st Division, the 102nd Division and the 201st Division, these three divisions are the main divisions to attack Annam, wearing rubber shoes, for them who fought in the mountains, like a tiger with wings.

Gao Junshan also did not land on Hainan Island, because the "Zheng He No. 1" did not have a dock to dock.

"Zheng He No. 1" is docked in the coastal waters of Sanya, and you can see the ends of the earth in Sanya with a telescope.

He summoned a group of officials from Hainan Island on the battleship to encourage and guide them, and most importantly, he summoned all the members of the rubber tree working group.

The successful cultivation and harvesting of rubber trees has enhanced the national strength of the Chinese country, which is immeasurable. First of all, the steam engine was greatly improved, electricity was used, and the wheels of the car were changed from wooden to rubber......

Gao Junshan gave heavy rewards to the members of the rubber working group, and the benefits of the hard work of these scientific and technological personnel can not be enjoyed in several lifetimes.

After a short stop at Hainan Island, the fleet set off again for Cam Ranh Bay.

Cam Ranh Bay consists of two peninsulas hugging each other in the shape of a gourd. The inner harbor of Cam Ranh covers an area of 60 square kilometers, the mouth of the bay is only 1,300 meters wide, the outer harbor is Pingba, the water depth is 10-22 meters, the width of the mouth of the bay is about 4,000 meters, and the water depth outside the mouth is more than 30 meters. It is one of the best deep-water ports in the world, and it is located on an important waterway connecting the Pacific and Indian Oceans, and has extremely important strategic value.

The fleet sailed smoothly in the South China Sea, because of the navigation charts of later generations, the fleet sailed very smoothly, and because of the sail and wooden ships in the formation, the fleet could only sail at a speed of 9 knots, and on the morning of the 10th day, it entered the waters of Annam.

Annam's fishing boats, which had never seen a large ship walking in smoke, took refuge as the fleet sailed all the way to the mouth of the Red River.

At the mouth of the Red River, it was connected with the front of the 101st Division, and a pioneer battalion commander of the 101st Division went to the "Zheng He No. 1" to report to Gao Junshan the current intelligence of Annan.

This battalion commander is called Yan Wenhua, the Dai platoon commander who crossed Lijiang at night, and now he has been promoted to battalion commander because of his military exploits.

According to Yan Wenhua's report, the six divisions of Huaxia State have basically controlled the entire Annan Kingdom, and the three main divisions are moving south.

Yan Wenhua's report mentioned that the supreme military governor of Annam, Zheng Jie, the king of the Qing capital, had surrendered in Gaoping because he could not withstand the powerful offensive of our army.

The problem is that at this time the main force of Zheng Jie's army was in the south fighting with the monarch of Quang Nam Nguyen Phuc Binh, and he asked us to send troops to Quang Nam Kingdom, and as long as we defeated Nguyen Phuc Binh, he would lead his army and subjects to submit to Huaxia.

Annam is the ancient Cochin, now the army of Gao Junshan has been occupied, Zheng Jie does not return to Shun, it is also the Huaxia country, Quang Nam is the southern region of Vietnam in later generations, if Guangnan can be occupied, then Vietnam in later generations will not exist.

Gao Junshan established the Command of the Expedition to Guangnan to form the Huaxia-Annam Combined Army, and appointed Zheng Jie as the deputy commander-in-chief of the coalition army to continue the war with the Guangnan State.

Zheng Jie led the coalition forces in the south to launch the Battle of Changde.

Quang Nam dispatched a naval army and drove hundreds of elephants to carry out an amphibious assault on the coalition forces.

The commander-in-chief of the coalition forces was the commander of the 201st Division, Major General Ho Thanh Provincial, who had already accumulated experience in defeating the elephant soldiers when dealing with the Burmese army, and the land offensive of Quang Nam was completely dismantled. Not to mention the navy, those few broken ships, Gao Junshan dispatched a large battleship of the Wuchang class, and they were beaten so that they could not find the north.

In the Battle of Chang Duc, Nguyen Phuc Binh's army was defeated, losing all the naval forces, not to mention 8,374 people were captured alive.

After that, the coalition forces pursued the victory, and with the cooperation of the Wuchang-class battleships, they won one victory after another.

The topography of Quang Nam is a narrow plain facing the sea, with dense forests, long mountains running through the whole territory, rivers and valleys crisscrossing the country, and fertile plains between the mountains and the sea.

The coastal terrain of Quang Nam gave the powerful fleet of the Huaxia Kingdom an opportunity to show its might, and the three Wuchang-class battleships went all the way south to assist the coalition forces in completely defeating Nguyen Phuc Binh's army.

Gao Junshan took the "Zheng He No. 1" all the way south and entered Cam Ranh Bay.

The battle against Quang Nam lasted for three months, and it was already January 1652 when the Nguyen Phuc Dynasty was completely overthrown.

After the occupation of Quang Nam, Gao Junshan promulgated a policy of appeasing the people, strictly prohibiting the indiscriminate killing of civilians.

Gao Junshan merged Quang Nam and Annam into Cochin Province, reused Zheng Jie, who had been in the expedition to Quang Nam, and appointed him as the governor of Cochin.

Gao Junshan's policy of administering the local area has always been to implement military management, even if you are the governor of a province, you must also accept the jurisdiction of the local garrison, and the governor has no military power, only administrative power.

Zheng Jie had a feud against the Guangnan Palace, and Gao Junshan did not want to get too involved in the disputes between local ethnic groups, so how to deal with the members of the Guangnan Palace, he gave full authority to the newly appointed Jiaozhi Governor Zheng Jie.