Hearing this, Tang Hao held his chin and nodded.


    Jiang in the hall often stared at Tang Hao and whispered.


    "According to my subordinates'' secret observation these days, most of the items carried by these caravans are fire oil."


    kerosene!


    This thing is not a rare thing for Datang.


    Folk lighting is mostly used for oil lamps, which is this kind of fire oil. It is a mixture of oil, vegetable oil and animal oil. The proportion of oil is very light.


    Of course, kerosene generally means that there is no such saying, which is the name of later generations. At this time, Datang did not have kerosene, a high-end thing.


    Of course, there are candles like yellow wax and white wax at this time, but the cost is very expensive. Ordinary people can''t afford to use them. The most common is to use them at weddings and funerals.


    But officially, it is different. The most common is the burning oil used in guarding the city. It is not fire oil, but fierce fire oil.


    Chang''an has a population of millions. The consumption of fire oil for living lighting in a year is astronomical.


    It''s not uncommon for a caravan from the western regions to transport kerosene to Chang''an for sale.


    Tang Hao frowned slightly and said.


    "How much kerosene did they bring?"


    If it is an ordinary caravan, it is normal to sell kerosene, but this caravan directly lives in the most chaotic east city of Chang''an city. Xuankong monk, who is also related to the former crown prince, has a close relationship and has to alert people.


    Especially in the Tang Dynasty, most of the houses are built of wood structure or thatch, which is very easy to burn.


    If there is a fire, it is bound to start a prairie fire. If the fire is not put out in time, I''m afraid that in a moment or three, a neighborhood will turn into ashes.


    He Feng''s face was dignified and said.


    "It''s a hundred barrels, each of which is estimated by my subordinates to be forty or fifty kilograms."


    When he heard this number, Tang Hao couldn''t help his eyebrows beating slightly.


    Four or five kilos of kerosene!


    If you sprinkle it on the neighborhood, you can easily destroy several neighborhoods.


    Pondering for a moment, Tang Hao asked in a deep voice.


    "What''s wrong with these caravans recently? Since they have traveled all the way, have they ever sold?"


    He Feng replied honestly.


    "Now every day, someone will go to buy, and in these days, dozens of barrels have been sold."


    As a result, Tang Hao wondered.


    If the caravan only guarded the 100 barrels of fire oil and did not sell it, the problem would be great.


    But now these caravans usually sell kerosene, so there is no problem in kerosene.


    Suddenly, Tang Hao thought of another possibility.


    In Chang''an City, there are not a few shops selling kerosene. These caravans sold more than ten barrels in a short time, with a total of hundreds of kilograms. Obviously, there is something fishy in it.


    If we say this food, we can hoard some to resist the disaster year. But kerosene is also used for lighting. In contrast, it is not used as much as grain. Who will buy so much at one time?


    Besides, if this caravan can live in such a dirty and messy place as Dongshi, it must not be a famous caravan.


    It''s been like this. Why is the fire oil they sell so popular?


    Moreover, since he Feng and Jiang Chang mentioned the matter, they definitely noticed something wrong.


    Tang Hao''s eyes flashed and looked at he Fengdao.


    "Have you ever investigated these people who bought kerosene?"


    He Fengdao.


    "Adults in mind, I also unconsciously listen to the subordinates put forward a sentence, why do the same as the kerosene trading, the western region commercial team will be more than Changan local merchants, and the only feeling, secretly investigation found that these people who buy kerosene, not from the Tang Dynasty, but from the western region."


    Western regions caravans traveled thousands of miles to transport the huoyou road to Chang''an. It suddenly became interesting for people who also have western regions identity but are in Chang''an to buy it.


    It seems that in a moment, the answer is ready to come out.


    Tang Hao had a sneer on his face.


    Obviously, these people are planning an action to burn Chang''an at a certain time.


    Calculate the time. It''s August 15 of the lunar calendar.


    Since ancient times, for Han people, the Mid Autumn Festival is an important festival. It will hold a series of activities, crowded and especially lively.


    Perhaps this is the time for them to do it.


    Tang Hao swept over him and said.


    "Does anyone else know about it?"


    Hearing the speech, they shook their heads.


    Tang Hao pondered for a moment and stared at he Fengdao.


    "Don''t make a noise about this. Mobilize all the bad people in Chang''an City and keep an eye on them. Anyone who has contact with the caravan should be recorded and must not be let go."


    The trouble is serious. If, as I guessed, on the Mid Autumn Festival, Chang''an City set fire, the official jinwuwei who maintains law and order can''t escape, and the officials of Wannian county are also responsible. Of course, Dali temple can''t escape its blame.


    At this moment, as a bad person, it is the best eye liner of Dali temple.


    If Xuankong''s conspiracy succeeds, he, as the supreme official with real power in Dali temple, will certainly be severely punished.


    But if he can successfully catch all these people, it will be a great achievement for Tang Hao in civil service.


    Tang Hao said in a deep voice.


    "Go deeper, check the time of these people''s plans, and be sure to find out those accomplices hidden in Chang''an city."


    Tang Hao paused and then said.


    "You two are fully responsible for this matter. If you encounter difficulties, you can directly report to me, and I will come forward to solve it."


    The devolution of power by Shangguan means that subordinates have the opportunity to make meritorious contributions and fully shows Shangguan''s absolute trust in himself. How can Jiang Chang not be excited?


    In this way, Jiang Chang can rest assured and show his fists and feet.


    After explaining to them, Tang Hao couldn''t sit still and got up and left Dali temple.


    This matter is related to the safety of tens of thousands of people in Chang''an city. Tang Hao didn''t dare to make decisions privately for the moment, so he had to report to the king of Tang in advance.