translation.en: I started experimenting, making models, talking to experts in the field, taking their feedback, and refining, and I kept on refining and refining for nights and weekends for over five years.
translation.zh: 之后我开始做实验，做一些模型， 展示给这个领域的专家们，倾听他们的反馈， 并进行改进，我一遍一遍的改进 这个过程持续了五年多。