如何恢复Keras LSTM状态

I have a LSTM model, when I process a batch, I want to reset the state of LSTM layer.Then after a few processes, I want to restore the original state of LSTM(with new weight I learned in above few processes) and continue processing. I know I can use reset_state() function to reset LSTM state. How can I restore the LSTM state? I have a LSTM model, when I process a batch, I