When did the tradition of whistling silently begin? What are the allusions?

Due to different political systems, historical cultures and customs, people mourn the dead in different ways. In burial, there are various ways of mourning. However, in addition to mourning, memorial service, farewell to the remains, and ashes placement, there are mainly the following forms of mass mourning and even state funeral mourning throughout the country:

Flags will be flown at half mast in mourning. After the death of important people who have made outstanding contributions to the country, high-profile people such as party and state leaders and religious spiritual leaders go to state funerals, and flags are flown at half mast in many countries. For example, after the death of an important Chinese leader or friendly head of state, flags were lowered at half mast in Tiananmen Square, xinhua gate, the Ministry of Foreign Affairs, embassies abroad and other important places where the national flag was raised.

(2) shoot a gun to mourn. When a state funeral is held, many countries have regulations on firing guns to mourn the dead, but the number of firing guns will be different in different periods and leaders. For example, when Dr. Sun Yat-sen was buried in Nanjing on June 1929, there were as many salutes as10/door.

(3) whistle to mourn. After the death of the head of state, trains, ships, warships, cars, factories, etc. You can make a three-minute horn to express your condolences. In China, 1976 sounded the horn for the death of Chairman Mao.

(4) Stop entertaining and mourning. Relatives and friends must be very sad when someone dies at home, and it is reasonable to be unhappy.

(5) Stop working and mourn. In order to express the memory of the deceased, some countries stipulate that during the state funeral, local or national work will be suspended for a certain period of time, during which there will be a moment of silence to mourn the deceased. When Sun Yat-sen was buried in China, there was a three-minute national shutdown.

(six) the provisions of mourning day. In order to show respect and memory for the dead, some countries stipulate a national mourning day from a certain day to a certain day, and the time varies.

(7) mourn with a blue seal. In some countries, it is considered disrespectful to use red ink for official documents when holding state funerals, so it is stipulated that all official documents must use blue seals within a certain period of time. When Dr. Sun Yat-sen died, there was a rule in China that official documents should be sealed in blue 1 month.

(8) greet the spirit and send the spirit to mourn. In some countries, when holding state funerals, representatives from all walks of life are specially organized to greet and send the spirits to express their condolences to the deceased. After the liberation of our country, although there is no explicit provision, people have seen the scene of spontaneous spirit welcoming many times out of nostalgia and admiration for the deceased. For example, when Zhou Enlai died, many people welcomed ghosts.

(9) Letters of condolence and condolence. In order to express condolences to the deceased, when you can't go in person, you can send letters of condolences to the deceased and express your condolences to your family, whether between countries, units or relatives and friends.

(10) offer a wreath to mourn. In order to express condolences to the deceased, whether local or foreign, domestic or foreign, people can buy flowers or buy homemade wreaths.