How did the mythical Gao become Zhao Gao? Is he a good guy or a bad guy after he became Zhao Gao? How did he die?

After crossing, it became a high-ranking official in Zhao Gao. Originally a cook, he was greedy for petty gains occasionally, and he was a standard ordinary citizen. However, in an accident, he was taken back to the state of Qin two thousand years ago. He failed in history and can do nothing but cook. He was humiliated in the state of Qin, and was finally arrested as a eunuch in the palace. After that, he won the favor of Qin Shihuang with his superb cooking skills, and was finally named Zhao Gao, becoming a great traitor in history. Later, he robbed Qin Huang of the elixir of life, lived for two thousand years, and died in the Heavenly Palace with the heroine.