feed_var {
  name: "x"
  alias_name: "x"
  is_lod_tensor: false
  feed_type: 20
  shape: 1
}
fetch_var {
  name: "save_infer_model/scale_0.tmp_1"
  alias_name: "save_infer_model/scale_0.tmp_1"
  is_lod_tensor: false
  fetch_type: 1
  shape: 1
  shape: 640
  shape: 640
}