Sun Hao did not run into the tunnel on impulse, but went out and asked Fu Min to call some people, and at the same time brought torches and gas masks.

Although Sun Hao and Li Gang traded a lot of strong flashlights, they could detect the oxygen in the tunnel with torches to prevent everyone from dying of lack of oxygen. In addition, this tunnel has not been opened for many years, and it is easy to produce harmful gases, and the role of gas masks is self-evident.

After Fu Min received the order, he gathered all the guards in the general's mansion, brought flashlights, rubber gloves, dozens of torches and gas masks, and the group came to the door of the study.

After Sun Hao's order, the 100 guards put on gas masks, lit torches, turned on flashlights, and walked towards the tunnel one after another.

After walking into the tunnel, Sun Hao found that the tunnel entrance was not wide, about two meters wide, less than three meters high, and all around were cut with stones.

Sun Hao counted every step he took, and after walking the stairs, there were a total of 68 steps. After walking up the steps, there is a flat ground below, which is all paved with stone slabs, but the ground is quite damp, and some low-lying areas are already waterlogged.

Sun Hao used to see that there were hidden arrows and rolling stones in the tunnels shown in the TV movies, so he ordered everyone to move forward tentatively, so as to avoid a large number of accidental casualties.

After walking for more than an hour, everyone didn't find any hidden arrows, let alone any treasures. Sun Hao couldn't help but feel a little disappointed in his heart, could it be that this tunnel was just a passage for escape? Sun Hao thought to himself.

In order to find out, Sun Hao asked 20 guards to go to the General's Mansion to bring some dry food first, and Sun Hao was ready to take some time to find out where this tunnel leads.

This tunnel almost became Sun Hao's last hope, Sun Hao did not find the technical information for building ships, muskets, and artillery in the house where the craftsmen of Restoration City lived, but only found a firearms workshop with some broken things in it.

Sun Hao, the musket and artillery of this era, is not eye-catching, but he just wants to understand how powerful the firearms technology of the Ming Dynasty is. Do those legendary rockets exist? Is the rocket artillery of the Ming Dynasty real or a legend?

The group was still moving inside, and an hour later, Sun Hao found that the surrounding area of the tunnel had changed, from the original passage cut by stone to the artificially dug tunnel, whether it was on the ground or around, it was gnawing and wow, very uneven.

This change gave Sun Hao hope, this is definitely not as simple as an escape tunnel. At the same time, Sun Hao also faintly heard the sound of running water. Where there is water, there must be a river, this is an ever-changing law, but it is only a question of size.

20 minutes later, Sun Hao and his party came to a natural cave, this cave is very large, very high, the bottom of the cave is a big river, there is a beach on the bank, the strong light can not illuminate the scene on the other side of the river, Sun Hao estimated that the width of the river is at least more than 200 meters.

This cave should be in the mountain not far behind Fuming City, Sun Hao is also strange, there is an underground river in the mountain, or such a large underground river, this has to be said to be a miracle.

Sun Hao carefully looked for some clues on the beach, although with the passage of time, he still found traces of human activity under the stone wall next to him. This discovery made Sun Hao overjoyed, as if he had seen countless treasures placed in the cave.

The river is divided into upstream and downstream, and Sun Hao is not sure whether to look up or down for a while, because whether it is upstream or downstream, traces of previous human activity have been found.

After careful consideration, Sun Hao decided to go down first, and if there was no harvest, it would not be too late to go upstream.

After deciding, Sun Hao waved his hand, and dozens of people quickly walked downstream.

The further down he went, Sun Hao found that the beach by the riverbed was getting wider and wider, and the cave was getting bigger.

Half an hour later, Sun Hao faintly saw a wide hole in front of him, but it was covered by many vines and plants, and he also saw some boats in the distance.

Excited, Sun Hao let go of his legs and ran up, and soon arrived at his destination.

When Sun Hao ran to the side of those ships, Sun Hao became dumbfounded.

Wharf, yes, is a wharf, an artificially built wharf, about 10 meters from the entrance of the cave, is an artificial wharf, and there are two abandoned modern docks next to it. The entrance to the cave was wide and high, and the ground was filled with all kinds of steel, except for the few towering stone stalactites.

There are also two semi-finished ships under construction in the dockyard, one in each dock, and several twin-mounted finished naval guns next to it.

The entrance to the cave is covered with many trees and vines, and it is difficult to see what is going on inside from the outside, except when you see a large river flowing out of the cave.

Seeing several semi-finished ships, Sun Hao was excited, but he didn't expect that Fuming City still had the ability to build modern ships.

However, after Sun Hao thought of the terrifying combat power of the Daming Naval Division, he felt that it was not surprising that Fuming City could build ships.

The Ming Dynasty was founded for nearly three hundred years, but the Ming Dynasty has never suffered a defeat, it is simply a winning army in the victorious army, but it is a pity that the ancient Chinese military has always been heavy land warfare and light water warfare. In fact, the Daming Naval Division is indeed the most powerful fleet in ancient Chinese history and even in the ancient history of the world.

The glory of Zheng He's voyage to the West is well known, and the battle of Sri Lanka captured its king alive and raised the prestige of the Ming Dynasty. It is a pity that the Ming Dynasty government later implemented a sea ban and dismantled the fleet, so that the Japanese were rampant and the sea air defense was weak, but after Qi Jiguang's rectification, the Ming Dynasty Navy Division regained its combat strength.

In the 16th century, the Portuguese colonists came to the east and wanted to turn Guangdong into a colony, but the Ming Dynasty sailors hit it hard in the naval battle, so that they dispelled this stupid idea and turned to make peace with China.

At the end of the 16th century, the Kou State launched a war of aggression against Korea, and the Daming Navy Division completely annihilated the fleet of the Kou State in the Battle of Luliang, and the national strength of the Kou State was weakened for 200 years. Even in the middle and late Ming Dynasty, the Ming Navy still fought Penghu twice, defeated the Dutch Sailor, and at the end of the 17th century, it recovered Taiwan in one fell swoop, and the Netherlands, known as the "sea coachman", fled in embarrassment.

The Ming Dynasty naval division fleet is large, well-equipped, and powerful in combat effectiveness, all of which are the most in China's past dynasties, and the Ming Dynasty naval division is equipped with hundreds of warships of various styles, and its main battle guns are more than 40 ship-borne guns, far exceeding the scale of the Spanish Invincible Armada and the British Royal Fleet at the same time, and can be called the world's first fleet.

It's a pity that such a powerful force was later abolished after being absorbed by the Manchu Qing and used to recover Taiwan, and the genius sailor general Shi Lang died in the position of marquis.

The Qing Dynasty did not think about flexibility, paid less attention to the construction of the navy, and even imposed a ban on the sea, which led to the defeat of the powerful Eastern Fleet. Later, the Manchu Shimizu Division simply became a maritime anti-smuggling team, and there was no piece of armor left by the British in the Opium War.

Because there were many vines at the entrance of the cave blocking the light, Sun Hao ordered the guards to cut off all the vines at the entrance of the cave, so that it would be convenient for him to count the materials here.