The changes made to the regulation of the crossbow are as follows: although crossbows and bows use the same starting principle, the difference is that an archer must manually maintain the pulling force of a bow by tilting the tendon of the bow with his fingers, retracting it with the muscles of the arm and back, then holding the same shape to aim (which puts pressure on the body and requires significant physical strength and endurance); While a crossbow uses a locking mechanism to maintain traction, the shooter`s effort is limited to pulling the string into the shutter and then releasing the shot by pressing a lever/trigger. This allows a crossbowman not only to handle a stronger pulling weight, but also to last longer with much less physical strain, which could achieve better accuracy. Starting in the fall of 2013, crossbows will be legalized for all bow hunters. There were also other types of crossbows, such as the repetitive crossbow, the multi-shot crossbow, the larger field artillery crossbows, and the repeated multi-hit crossbow. On the textual side, there is almost nothing but temporary references in the military historian Vegetius (fl. + 386) to the „manuballistae” and „arcuballistae”, which he said he had to refuse to describe because they were so well known. His decision was most regrettable, as no other author at the time mentions it. Perhaps the best guess is that in Late European Antiquity, the crossbow was mainly known as a hunting weapon and was only used locally in certain units of the armies of Theodosius I, which Vegetius knew.  A direct comparison between a hand-drawn fast crossbow and a long crossbow shows a firing rate of 6:10 or a rate of 4:9 within 30 seconds and comparable weapons.  Crossbows are legal during archery season and firearms season. A crossbow permit is required if the season is „archery only”. No license or registration is required to own a crossbow in the UK. Under the Crossbows Act 1987, crossbows in England, Wales or Scotland may not be bought or sold by or to persons under the age of 18.
Possession is also prohibited for persons under the age of 18, except under the supervision of adults. The law states that crossbows can only be used by people under the age of 18 if they are supervised by a person who is 21 years of age or older.  Similar prohibitions for Northern Ireland are set out in the Crossbows (Northern Ireland) Order 1988. Section 5 of the Wildlife and Countryside Act 1981 prohibits their use in bird hunting. In Scotland, section 50 of the Civic Government (Scotland) Act 1982 makes it illegal to be drunk in a public place in possession of a crossbow. Today, the crossbow often has a complicated legal status due to the possibility of lethal use and its similarities with firearms and archery weapons. While some jurisdictions consider crossbows to be firearms, many others do not require a license to possess a crossbow. The legality of using a crossbow for hunting varies greatly around the world and even in different jurisdictions of some states. Whether it`s legally considered a gun depends on the state and country you`re in, and even then, it`s a gray area.
In the United States, each state will have a website on gun regulation and will rate crossbows if necessary. Portable crossbows with intricate bronze trigger mechanisms were also found in the terracotta army in the tomb of Qin Shihuang (r. 221-210 BC), which resemble specimens from the following Han Dynasty (202 BC – 220 AD), while crossbowmen described in the Qin and Han dynasties learned exercise trainings, some were even mounted as tanks and cavalry units, and Han Dynasty writers led the success of many battles. against the city-states of Xiongnu and the western regions on massed crossbow salvos.   Bronze prints were designed to store a large amount of energy in the bow when fired, but could be easily pulled with little resistance and recoil when the trigger was pulled. The trigger nut also had a long vertical spine that could be used as a primitive rear visor for height adjustment, allowing for accurate shooting over longer distances. The Qin/Han era crossbow was also an early example of modular design, as the bronze trigger components were also mass-produced with relatively precise tolerances, making the parts interchangeable between different crossbows. The trigger mechanism of one crossbow can be integrated into another by simply falling into a milling slot of the same specifications and fixing it with ankle pins.
Some crossbow designs have also been equipped with bronze bumpers and trigger guards. Crossbows can be used during muzzle-loading deer season and big game rifle season. A hunter must not be in possession of a crossbow during hunting during the archery season or the shotgun/muzzle. A person hunting big game must not be in possession of a crossbow that requires less than 150 pounds of pulling weight or an arrow that uses a wide head less than 7/8 inches wide. Under the supervision of a disabled crossbow licence, a permanently disabled archer may use a crossbow during an archery season. Legal crossbows for all hunters for all species EXCEPT deer. Crossbow hunting for disabled hunters with legal permission. Historically, crossbows have played an important role in the war in East Asia and Europe.  The first known crossbows were invented in the first millennium BC, at the latest in the 7th century BC in ancient China, at the latest in the 1st century AD in Greece (as gasraphetes), each civilization developed the weapon independently of each other .