Query on the thought of pure land Sect

Your question is really professional, and I deeply admire it. My answer is the conclusion drawn by human beings through archaeology and scientific research, and it has nothing to do with faith. First of all, we can be sure that the thoughts and works of Pure Land came into being after the division of sects, because when Sakyamuni was alive, he mainly preached thirty-seven products, based on the contents of Buddhist scriptures and Agama. According to textual research, in 395 years after the extinction of the Buddha, the original Buddhist monks in India had the greatest division, and in 445 years after the extinction of the Buddha, Mahayana Buddhism began to rise. Although I don't know when the concept of pure land appeared, the Infinite Life Sutra first appeared in India, about 604 years after the extinction of the Buddha. The Pure Land Classics first introduced into China were Amitabha Sutra translated by Zhi Qian in 772 and Infinite Life Sutra translated by Kumarajiva around 945. Mahayana Buddhism is not a school, and there are many departments in India, so there is no pure land, which is developed by Zen Buddhism. These two are independent. The reason why the two branches kept pace with each other was because of the needs of China's national conditions and the needs of believers at that time, so these two branches developed well.