Preview2 预览2
The preview2 version is a small upgrade to the first preview. 
preview2 版本是对第一个 preview 版本的小幅升级。 

A significant part of the training is redone with different hyperparameters and techniques, designed to help make the model more robust to finetuning. 
训练过程中很大一部分会使用不同的超参数和技术重新进行，旨在使模型对微调更加稳健。
It is trained for much longer at medium resolutions in order to acquire more character knowle...