Introduction
./G_AISHELL.pth is downloaded from https://huggingface.co/jackyqs/vits-aishell3-175-chinese
./lexicon.txt and ./tokens.txt are generated from https://github.com/csukuangfj/vits_chinese using generate_lexicon_aishell3.py
./vits-aishell3.onnx and ./vits-aishell3.int8.onnx are generated using https://github.com/csukuangfj/vits_chinese/blob/master/export_onnx_aishell3.py