You have the right not to speak.

Shi Yian's expression changed slightly, but he still nodded.

Captain Qi had a serious expression on his face: "According to the information we have, Xu Gongmao may be planning to sell a batch of old items. We suspect that these old items are related to the collections stolen from the Shi family five years ago. What do you think about this?" Captain Qi stared at Shi Yian's eyes closely.

Shi Yian lowered his head in thought for a moment, then slowly raised his head: "To be honest, I have always felt that the theft was a bit strange. But for some reason, we did not investigate it in depth at the time. If we can recover the lost cultural relics this time, I am certainly willing to cooperate with your work."

"Very good." Captain Qi nodded with satisfaction. "I hope you can provide more clues so that we can solve the case as soon as possible."

"I'll do my best." Shi Yian promised solemnly, and took out a few yellowed A4 papers from his bag, and took out a large stack of A4 papers and a large account book from his briefcase: "We usually send two people to do the inventory so that we can supervise each other. I specially opened an inventory list for the old items. This was the inventory one month before the theft. Fortunately, we took inventory of the old items every three months at that time. I brought all the inventory lists for that year with me."

He rubbed his hands nervously, and said with an awkward expression: "Recently, I have been focusing on taking care of my father, and I haven't had time to check the accounts... Give me three hours."

"No problem, our police force will arrange personnel to assist you in checking it." Captain Qi agreed readily.

Officer Zhou patted his shoulder comfortingly. "We just happened to have five college students in our station. Let them do the inventory. Young people are more careful."

He immediately said to Haihua in a gentle voice: "You five, take the inventory list and account book and go to the interrogation place to check."

Shi Yian showed a grateful look, "Thank you."

Afterwards, several interns and Police Officer Li began to carefully check the account books and inventory sheets. As time passed, the only sounds in the room were the turning of pages and occasional whispered discussions.

Two hours later, the six people came back and handed a brand new A6 paper to Captain Qi, who handed it to Shi Yian: "Mr. Shi, take a look..."

Shi Yian looked down and an expression of surprise appeared on his face, "This... this is impossible..." He widened his eyes and looked at the A4 paper in his hand.

"What's wrong?" Captain Qi asked hurriedly.

Shi Yian pointed to a record and said in a trembling voice: "The antique shown here does not appear in the stolen list, but... it is gone now."

The straight-talking man in the team asked directly, "That means someone is cooking the books. Mr. Shi, is it expensive? Do you remember what it looks like?"

This question calmed Shi Yian down. He took a deep breath and replied, "Some old items are more valuable the smaller they are. For example, the small wine pot from the Yongzheng period, although not big, is a treasure! It is golden in color, and because there are very few of them in existence, its market value has always been high. Moreover, its grade is slightly lower than the Ming Chenghua Doucai Sanqiu Cup."

After he finished speaking, he paused and fell into reminiscence: "I remember when I was a child, my father often told my three siblings and me the stories behind those old objects. Originally, our ancestors had a special liking for old objects from the Yongzheng period, and almost all the money they earned was used to buy these precious collections. Later, as time went by, it became difficult to find old objects from the Yongzheng period on the market, so they began to collect calligraphy and paintings instead. However, that guy Li Shufu actually stole three paintings. Fortunately, he knew nothing about calligraphy and painting, otherwise the more valuable paintings would probably have been stolen by him." At this point, Shi Yian's eyes flashed with a trace of regret and anger.

Haihua said: "Yes, two paintings were stolen five years ago, one by Tang Bohu and one by Emperor Yongzheng."

Shi Yian shuddered, his eyes widened in shock: "What..." He snatched the A4 paper from Captain Qi's hand. A row of vigorous and powerful handwriting seemed to pierce through the paper. The names of all the lost items were like pairs of eyes, shining directly at him, making him close his eyes in pain, and his face turned as pale as a piece of paper.

Song Chi, who was the first to notice that something was wrong with him, quickly pulled his collar from behind to prevent him from fainting.

"No, help him lie down." Everyone hurriedly put four chairs together. Shi Yian had woken up by then and refused to lie down. He leaned against two chairs put together, and said with a pale face, trying to squeeze out a smile that was uglier than crying.

：I haven't had a good rest recently, and my mental state is particularly bad. I got up too late this morning and didn't have time to eat breakfast. Now I feel light-headed and dizzy. It may be because my blood sugar is too low, so I feel so uncomfortable. Can you help me find something to eat? As long as I can fill my stomach a little, I can regain some strength and continue to persevere. Thank you very much!

Auxiliary police officer Lao Hu replied, "I'll go. I have some sugar and biscuits. People with low blood sugar should drink some sugar water." After another busy day, Shi Yian finally regained some popularity, but he was reluctant to leave.

Captain Qi looked serious. "So this theft may be more complicated than we thought. Mr. Shi, don't worry, we will do our best to recover the stolen items."

He turned to look at Officer Zhou and said firmly, "Tu Bin, you must immediately cooperate with Officer Zhou and transfer Li Shufu to re-interrogate him. In addition, we must send more police officers to protect Mr. Shi's personal safety. This is an important task that must be carried out quickly and effectively."

After hearing this, Officer Tu Bin nodded solemnly and responded, "Yes!" Then, he saluted his leader with a standard military salute, expressing his acceptance and respect for the order. Then, Tu Bin and Officer Zhou hurried away together, their steps firm and powerful, showing the professionalism and execution that police officers should have.

Shi Yian frowned, "Captain Qi, I'm worried that it's not just Li Shufu who did this. There may be other accomplices."

Captain Qi nodded. "I feel the same way. There may be a bigger criminal gang hiding behind this. We must be careful and not alert them."

At this time, a police officer came in and reported: "Captain, we have a clue! Some documents related to antique transactions were found in Li Shufu's home." Captain Qi was excited, "Immediately launch a comprehensive investigation and make sure to find out the mastermind behind this!"

Captain Qi acted decisively and directed the police officers to work in groups. One group continued to dig deeper into Li Shufu's network of relationships to find possible accomplices, while the other group conducted a detailed analysis of the documents found to try to find key clues.