Just as the group was about to set off, Wang Qiang suddenly remembered something: "If the hundred officials find that this Ding is not there, wouldn't it be possible to expose the combat intent?" ”

The old emperor smiled and said: "It's easy to do, I will give hundreds of officials a month's holiday on the grounds of auspiciousness from the sky, and if there is something to do, just go to Master Jia's mansion to do it." ”

Everyone laughed: "This emperor who is on vacation and doesn't care about anything, the enemy must think that he is mediocre, right?" ”

Jia Rudao couldn't help but break out in a cold sweat, I'm afraid this kind of joke can only be made by these gods.

The old emperor really didn't care: "I also want to emulate King Chuzhuang, but if you don't ming, you have already made a splash!" ”

Jia Rudao had no choice but to nod: "The minister must work hard to deal with state affairs!" ”

So after everything was explained, the group boarded the brocade sailboat again under the onlookers and cheers of the people in the city, beating gongs and drums, and did not stop for a day to start again.

Soon, the Jin sailboat entered Hangzhou Bay along the Qiantang River, and the vast soup in front of him was vast and blue.

Su Su sighed with emotion: "General Gan, do you know the fame here?" ”

Gan Ning said with a smile: "Qiantang tide watching, but unfortunately it is a movement that arose in the Tang and Song dynasties, and there was no such thing as the Three Kingdoms." ”

Su Su said with a smile: "Tide watching is a trivial matter, the tide is indeed a major matter, every qualified admiral should accurately understand the tide schedule of each place, even if it has entered the era of industrial electricity, the five-star general of the US military MacArthur has also made perfect use of a tidal landing here in Incheon, North Korea, and is worthy of his five-star title." ”

Gan Ning smiled: "Don't worry, when the dragon enters the sea, I will always pay attention to it——"

Speaking of this, Gan Ning smiled at Wang Qiang with bad intentions: "Wang Qiang, do you know what the tide is all about?" Do you know when the tides occur? ”

I'll it! Brother knows that you must be half-aware of a "river pond water master", so you deliberately use your brother to divert the topic, right? But it's a good question, brother really doesn't know!

Wang Qiang had to entangle: "It seems to be caused by the gravitational pull of the moon, probably a few days after the Mid-Autumn Festival." ”

Su Su laughed: "That's right, on the eighteenth day of the eighth month of the lunar calendar every year, the sun, moon and earth are almost on the same line, and the gravitational pull on that day is the largest, so the tide is also the largest." The unique horn topography and slope structure of Hangzhou Bay make it easy for the tide to enter and exit, and the front wave slows down and the back wave immediately catches up, which is to form a wonder of the world with wave after wave. ”

Wang Qiang suddenly understood: "Yes, yes, yes, there must be a big event when the sun, moon and earth are connected, just like the nine planets in fantasy will end the world when they are connected." ”

Su Su smiled: "Maya's 2012, don't listen to it, when it comes to the astronomical calendar, Maya really can't compare with China, if it can invent the twenty-four solar terms, I will really accept it." Not to mention that the Mayan texts are all far-fetched translations by archaeologists of later generations - in short, if it is far away, let's talk about the tide, the day is called the tide, and the night is called the tide, 'the first day of the fifteenth day of the high tide, the eighth and twenty-third days of the first month see the beach', as for the specific tide calculation time, Brother Qiang listen! ”

Wang Qiang was completely confused, so he had to nod his head.

Su Su smiled: "The lunar calendar day × 0.8!" ”

Wang Qiang was stunned and said, "That's it? ”

Su Su smiled: "To add a correction, the lunar day of the first half of the month is -3, and the lunar day of the second half of the month is -18, for example, if today is the fifth day of the lunar calendar, which is the first half of the month, then -3, which is equal to 1.6!" ”

Wang Qiang was surprised: "What does 1.6 mean? ”

Su Su smiled: "1:36 in the morning!" 36 divided by 60 equals 0.6! ”

Wang Qiang finally understood one thing: "Is the lunar calendar day × 0.8 so easy to remember?" ”

Su Su smiled: "This is a simple calculation method, there is still an error, but it will not exceed a lot, just like a woman calculating her aunt, there will not be much error, this is the strength of the Chinese lunar calendar!" ”

Wang Qiang suddenly realized that he could calculate his aunt, and it was really not a matter to calculate the tide!

Su Su said with a smile: "However, the shape of the earth is different, and the tide time is different in different places, which requires long-term data collection and aggregation, which is also one of the important parameters for the Navy to collect hydrographic data." ”

Wang Qiang sighed: "Understood! ”

Gan Ning also laughed: "Teachable!" ”