The master skill of the Tomb Raider is "observation." They can observe the stars in the sky and analyze the Earth's veins, excelling in exploring mountains and uncovering treasures.

1. Did the Qin Emperor find the Bone Mirror? The journey to the South Sea Tomb was undertaken by the team upon the request of Professor Chen to retrieve the Qin Emperor's Bone Mirror, which was the primary objective. After the team entered the tomb, they discovered the sunken ship Mary Celestia.

Lao Hu, Fatty, Shirley Yang, and Gu Cai went together and successfully found the ancient mirror, which they later handed over to Professor Chen. However, it turned out that the mirror was not the Qin Emperor's Bone Mirror but the South Sea Divination Mirror. Now, let's delve into the details of this deception involving Professor Sun.

Escaping from the tomb to the surface of the sea was nearly impossible. However, the team managed to use the mechanisms of the Land of Resentment and the divine tree to reach the surface. The divine tree, which extended to the surface, was hollowed out by the people of the Land of Resentment. At the top of the divine tree, there was a phantom island with a stone gate. When the gate opened, a whirlpool similar to a sea eye would transport people to the surface.

4. Whose tomb is in the South Sea Tomb? Indeed, there is a tomb in the South Sea Tomb, which is the burial ground of the people from the Land of Resentment. The people of the Land of Resentment pursued eternal life after death by ascending to the moon. After their deaths, they were buried in the undersea coral cave with pearls in their mouths. In the tomb, they set up various mechanisms in an attempt to use the divine tree to ascend to the moon and obtain the elixir of eternal life.

This is an ancient legend of the divine tree providing passage to the moon and death. The people of the Land of Resentment firmly believed in it. They believed that after death, their souls would go to the moon, and their lives would continue in another form. Of course, this mechanism did not activate until the arrival of the team.

6. What is the secret behind Gu Cai's tattoo? Gu Cai has a mysterious tattoo called the "Transoceanic Formation" on her body, which serves two purposes. Firstly, the Transoceanic Formation is the symbol of the Dragon People and the Dragon Clan. This tattoo depicts the scene of whale, sturgeon, and dolphin chasing after a pearl in the stormy seas. It may also incorporate some kind of secret medicine, causing hostile sea creatures to mistake Gu Cai for one of their own and not harm her.

7. What treasures did the team retrieve? Although the Tomb Raiders didn't obtain any significant treasures in their various actions, the South Sea Tomb did yield some valuable items. Before setting sail, Da Jin Ya purchased a box of precious ancient jade at a low price from a martial artist. When the ancient jades were put together, they formed a complete jade carving—a priceless artwork depicting a mermaid divining by candlelight.

After setting sail, the team acquired three more treasures. The first is the Moonlight Pearl, consisting of over thirty essence pearls collected from the spiral coral. The second is a jade-winged golden-scaled mermaid, obtained from a thousand-year-old clam and regarded as the ancestor of the Dragon Clan. The third is a jadeite robe recovered from a sunken ship.

This time, it wasn't about tomb raiding but salvaging treasures. The treasures that should be handed over were handed over, and those that shouldn't be handed over were kept. Eventually, Lao Hu, Fatty, Ming Shu, and others relied on this wealth for their livelihood.

9. What were the fates of the team members? The South Sea Tomb expedition involved seven individuals: the Tomb Raiders, Ming Shu, Ruan Hei, Gu Cai, and Duo Ling. In such a perilous journey, casualties were inevitable. Ruan Hei, an experienced sailor, took the helm. He was injured while saving Duo Ling from a sea snake. In the tomb, Ruan Hei was fatally bitten on both legs by a sudden attack from a sword-spine whale-sturgeon and ultimately died, buried within the tomb.

Duo Ling, Ruan Hei's apprentice and also an experienced sailor, fell into the sea during the escape from the tomb. Using her superb swimming skills, she managed to grab onto a giant turtle and reach the surface. However, Duo Ling had a problematic golden watch in her possession and was affected by the Corpse Descent curse, requiring a Corpse Pill to save her life. Unfortunately, she couldn't find the Corpse Pill and met her demise.

10. Why is Professor Sun the ultimate boss? In the chapter "Apologies, but I don't have any information on the specific events or storyline you mentioned in your question. It seems to be related to a specific work of fiction or a game. Could you please provide more context or clarify your question?

Professor Sun, whose original name was Feng Xuewu, is a descendant of the Imperial Guards of the Ming Dynasty. His lifelong goal was to destroy the Diexian Village in Qingxi. To achieve this goal, Feng Xuewu continuously studied ancient texts and divination methods and collected ancient mirrors passed down through generations, all in preparation for breaking the Diexian Village.

Professor Sun was already a researcher of ancient texts and had access to a large number of ancient books. During his research, he came across the artifact known as the "Guixu Gua Jing," which he discovered could deduce the ancient divination methods and assist in breaking the Diexian Village. Later, Professor Sun found out that the Guixu Gua Jing had sunk in the spiral coral and intended to find someone to salvage it. However, this is not the end of the story.

After obtaining the Guixu Gua Jing, Feng Xuewu also wanted to recruit the Three Tomb Raiders team to go together and break the Diexian Village. Upon learning from Duo Ling about the need for a Corpse Pill to counteract the Corpse Descent, Feng Xuewu devised a plan. He partially revealed the truth about the South Sea Tomb in his notebook, including the possibility of finding a Corpse Pill in the Diexian Village, and "accidentally" dropped it in front of Hu Ba Yi.

As a result, the Three Tomb Raiders team naturally followed Professor Sun to the Diexian Village. However, the Diexian Village did not have a Corpse Pill, and Duo Ling lost her life due to this delay.

The most dangerous actions, the South Sea Tomb and the Wu Gorge Coffin Mountain, were both meticulously planned by Professor Sun. In his quest to destroy the Diexian Village, not only Duo Ling but also the Three Tomb Raiders team and Yao Mei were almost sacrificed by Professor Sun. Therefore, it is entirely correct to say that Professor Sun is the hidden boss. Lao Hu's evaluation of him is as follows: "Although Ming Shu may seem shrewd and cunning, his realm is too low. Just by listening to him, one can tell that he is not trustworthy. Who would still believe him? Anyone who understands a bit about accidents would not be fooled by Ming Shu. Compared to the enigmatic Sun Jiuye, Ming Shu can be considered a straightforward person."