Why did the ancient medical red line lead to pulse? Is this accurate?

It's called hanging silk and cutting pulse.

Suspension spring's pulse-taking means that men and women were not close in ancient times, so one end of the silk thread was put on the wrist of a female patient, and the other end was held by a doctor. Doctors must guess and feel the pulse condition and diagnose the disease by the hand feeling from hanging silk. Later invisible means: speculation that has not been actually investigated.

Is there really a matter of hanging silk for pulse diagnosis in history? Can the patient's pulse be transmitted to the doctor through silk thread? In order to find out this problem, I specially consulted Shi Jinmo, one of the four famous doctors in Beijing. Mr. Shi Lao used to see a doctor in the royal family of the Qing court. He said that this hanging silk pulse diagnosis can be said to be true or false. The so-called truth, it did happen; The so-called fake, hanging silk is purely formal. It turns out that concubines are always introduced by personal eunuchs, and doctors often ask these questions in detail, such as appetite, tongue coating, defecation, symptoms, course of disease and so on. In order to get real and detailed information, sometimes doctors often send some gifts to eunuchs. When all this is asked, Doctor Tai will keep it in mind. When it is time to feel the pulse, the doctor must also hold his breath and remain calm and serious. To do so, first, observe court etiquette and show ministers' respect for the royal family; The second is to use this time to meditate on the prescription and prepare for treatment, so as to avoid getting into trouble because of careless words and improper medication.