How was the entrance of Dingling underground palace discovered?

In the mid-1950s, Wu Han, a famous historian and expert in Ming history in China, proposed to his superiors? Uncover the secrets of the Ming Tombs? This plan. The content of this plan is to open the largest imperial tomb-Changling.

As the largest and most well-preserved mausoleum among the Ming Tombs, Changling is naturally the first choice of Wu Han and others. Therefore, once their plan was approved by their superiors, they led their own archaeological team to Changling.

Archaeology is a dialogue between modern people and the ancients; Searching for ancient tombs is a game of wisdom between modern people and ancient people.

Many ancient tombs in history were abandoned by grave robbers because they could not find the entrance. For example, Wu Zetian and Tang Gaozong were buried together in Ganling, Yuanling and Qin Shihuang Mausoleum.

For the emperor, the entrance to the mausoleum is the last lock in his treasure house. Once lost, the consequences are unimaginable.

Changling is the tomb of Judy, the third emperor of Ming Dynasty. It was built in the heyday of the Ming Dynasty. Therefore, from the perspective of materials, technology, planning and construction period, it is the most troublesome among the Ming Tombs.

If the archaeological team wants to open the ancient tomb, it must find the entrance to the underground palace; Otherwise, it can only be scooped out directly from the top of Baoding (sealed soil), which will inevitably destroy the cultural relics in the tomb and have a negative impact on archaeological work.

After more than a month's search, the archaeological team found nothing in the archaeological investigation of Changling. However, the archaeological team had to focus on the smaller Dingling, the tomb of Emperor Wanli.

Although Dingling is not as big as Changling, the hidden pyramid-shaped mound is also very clever.

After more than ten days of on-site investigation, the archaeological team finally found traces of fracture on the wall of Dingling Baocheng. This fracture has aroused the vigilance of archaeologists. What is the cause of the fracture?

So, the archaeological team dug a ditch on the wall of Baocheng.

The first ditch has just been dug more than one meter deep, and an important message was found: Is it carved on the wall? Tunnel door? Three words.

The discovery of the tunnel door greatly improved the morale of the archaeological team, and the more they worked, the more motivated they became. However, they soon discovered a new problem: when will this 30-meter-deep water ditch reach the underground palace gate? Baoding is far from Baocheng!

What makes the archaeological team even more headache is that many employees have gone home to grow crops; If there is no result, you can only dig them down with a shovel yourself.

In order to reduce the amount of excavation, the archaeological team decided to dig again on the extension line of the first ditch.

The second ditch is not as flat as the first ditch. It not only found the tunnel door, but also found the brick tunnel. The archaeological team dug for a month and only found dirt. However, this ditch has been dug too deep, and we must not give up easily.