./zipformer/export.py \
  --exp-dir zipformer/exp-large-cr-ctc-rnnt \
  --use-cr-ctc 1 \
  --use-ctc 1 \
  --use-transducer 1 \
  --use-attention-decoder 0 \
  --num-encoder-layers 2,2,4,5,4,2 \
  --feedforward-dim 512,768,1536,2048,1536,768 \
  --encoder-dim 192,256,512,768,512,256 \
  --encoder-unmasked-dim 192,192,256,320,256,192 \
  --tokens data/lang_bpe_500/tokens.txt \
  --epoch 50 \
  --avg 26