As time passed, the benefits of the Battle of Ha Long to the Chinese forces became more and more apparent.

After Sun Bin urgently transferred Liang Xing from the Natuna Islands, after several days of busy liquidation, the total amount of seized materials was collected, of which the treasury silver looted from the local government and the ransom paid by the captured officials was 1.04 million taels, and the seized tea, cloth and other surplus materials were sold and turned into 200,000 taels of silver.

Haiphong, Quang An and Haining provinces are coastal provinces, because the French occupy the southern provinces of Annam, the merchants of Annam in the north took advantage of the geographical advantage of being close to the French to buy tea, porcelain and other oriental luxury goods from the coastal areas, and then sold them to the French by sea transportation, and then the French merchants transported them back to the European continent to sell at a high price.

Merchants are mercenary, whether it is colluding with the Jin merchants of Liaodong or the merchants of Annam, it is a virtue, and after the three provinces fell into the control of the Chinese, Sun Bin did not be polite to them, all the ships of Annam docked in the port were detained, the ships whose tonnage exceeded the requirements of the ocean were confiscated, and the ships with a slightly smaller tonnage were redeemed by the owners of the ships.

The merchants were rich but had low political status, and the Hue court was overwhelmed by the turmoil in Annam, and they had no choice but to do justice for them, so the merchants of Annam, who had no choice, could only pay the ransom honestly and redeem some ships of smaller tonnage according to the requirements of the Chinese troops.

The tonnage of Annam merchant ships is not very large, and the total number of merchant ships detained as ocean-going transport ships is eight, and the tonnage is between 400 and 800 tons.

Eight merchant ships, Sun Bin planned to be converted and three armed merchant ships to form a Nanyang fleet, and select sailors from among the defectors to serve as sailors to protect Annam and the Natuna Islands.

The eight remaining merchant ships were removed, and the rest of the ships were redeemed to bring 300,000 taels of income to the Chinese troops.

Counting all kinds of captures together, and deducting the bounties distributed to the soldiers and the young people in the camp, the battle of Xia Long brought nearly 1.2 million yuan to the Chinese troops.

Killing people and setting fire to the gold belt, looking at the mountains of real money and silver piled up in the warehouse, Sun Bin couldn't help but sigh that it was still the fastest way to get money from war and robbery.

With abundant money and food, Sun Bin was able to carry out the tasks assigned by Li Mingyuan without restrictions, and recruited Chinese on a large scale in the northern provinces of Annam and the border areas on the mainland of Annam.

The sudden rise of Sun Bin's troops attracted the attention of most of the Chinese forces in northern Vietnam, Annam and Guangxi at the junction of Annam and Guangxi, starting from the announcement of a large-scale recruitment of Chinese, the Chinese in Hai Duong, Hanoi, Bac Ninh, Nguyen and other northern Vietnamese provinces raised villages to join them, while the small peasant army entrenched in Lang Son Province invited Chinese troops to settle in the local area and included the areas they occupied into the occupied area.

Lang Son Province has many mountains and few lands, close to the border of Guangxi, the area is three times that of Quang Ninh Province, most of Lang Son Province is divided and occupied by a group of peasant army forces, and the Annam army only occupies a small area, after receiving the invitation of the local peasant army forces, Sun Bin sent Ye Chenglin to lead a thousand young men to march into Lang Son, after three or four days of emergency marching battles, the Annam troops in Lang Son Province were exterminated, and the peasant army armed forces along the way continued to join Ye Chenglin's troops, and finally three-quarters of the land in Lang Son Province fell under the control of the Chinese troops, Only the two border counties occupied by Liu Yongfu had an unclear attitude and did not positively express their intention to take refuge.

Most of Lang Son Province was under control, and the two small remote counties occupied by Liu Yongfu could not affect the overall situation, so Ye Chenglin, under Sun Bin's instructions, did not take armed action against Liu Yongfu's department for the time being.

Taking advantage of the situation, the peasant army armed forces like Liu Yongfu who swayed on both sides were only a few, and most of the peasant army armed forces and Chinese displaced people still conformed to the general trend of the Chinese troops, abandoning Wu Yazhong and other large peasant army armed forces that lacked money and food, and changed the target of defection to Sun Bin's department.

The local peasants launched a rebellion, and the Annan troops did not dare to provoke Sun Bin's troops, who were gaining momentum, at this time, and allowed the Chinese displaced people and peasant army forces passing through the defense area one after another.

Half a month has passed in the great strides of the Chinese army to expand its sphere of influence, and compared with the Chinese immigrants recruited a month ago, the Chinese displaced people this time have come in a larger formation. More than 50,000 Chinese defected from various parts of Annam, about 200,000 from the four provinces where Chinese gathered in Langshan, Haiphong, Quang An, and Haining, and 20,000 impoverished displaced people from the border areas of Guangxi, such as Taipingfu, Longzhou, and Pingxiang.

The total number of Chinese from different regions is about 280,000, which is more than the number of Chinese in Rio Gran do Sul.

Most of the 280,000 Chinese are located in Quang An, Hai Ninh, and Lang Son provinces, and in addition to the soldiers stationed in Hai Phong Province, ordinary Chinese are moving to the other three provinces.

Haiphong was the gateway and treaty port of Hanoi, an important city in the northern part of Annam, and forcibly occupying Haiphong would not only provoke a backlash from the Annam court, but also offend the French.

Sun Bin didn't care what the attitude of the Annan court itself was, but behind Annan stood the Qing army that had just exterminated the Taiping Heavenly Kingdom, and if the Annan court ignored the Qing army for assistance, the territory that the Chinese troops had just won would be in danger of being destroyed.

Considering the intervention of the Qing army and the French army behind Annam, Sun Bin made arrangements in advance before the occupation of Haiphong, and while rectifying the Chinese armed forces in the occupied area, he sent messengers to negotiate with the Hue court on the terms of Zhao'an.

When Liang Xing, the representative sent by Sun Bin, visited Huang Jiyan with Le Yu and a sum of seized silver, the two sides reached the conditions of recruitment after four days of urgent negotiations:

1. Chinese troops withdrawing from Haiphong Province are not allowed to damage the city's coastal defense facilities or threaten the safety of officials until the Annam troops take over.

2. Release the 10,000 Annam soldiers and officers who were captured.

Third, it is not allowed to secretly support the local rebels in Annam,

Fourth: Restrain the armed peasant army under his command and not collude with the peasant army under Wu Yazhong's department.

5. Merge the two small provinces of Quang Yen and Haining into Quang Ninh Province, canonize Sun Bin as the governor of Quang Ninh Province, with a fixed number of 3,000 soldiers, and no private expansion of the army. ……

There are a total of 13 conditions for recruiting security on the surface, but some of the conditions behind the scenes are shady content, such as the Chinese troops surrendered to the concubine Huang Jiyan and obeyed Huang Jiyan's personal command, and the Hue court acquiesced in the actual occupation of Lang Son Province by the Chinese troops, handed over 300,000 taels of silver to the Chinese troops in the name of military salaries, and hired them to encircle and suppress the local rebel forces......

All the agreements were signed on the surface and behind the scenes, and the Chinese troops became vassals of the Annan court, and nearly 300,000 Chinese in Annan had a legal identity, and Sun Bin's actions in Annan also put another layer of clothing.