diff --git a/gradio_apisr.py b/gradio_apisr.py
index 7d5b2cf..1334e2d 100644
--- a/gradio_apisr.py
+++ b/gradio_apisr.py
@@ -1,5 +1,9 @@
+'''
+    Gradio demo (almost the same code as the one used in Huggingface space)
+'''
 import os, sys
 import cv2
+import time
 import gradio as gr
 import torch
 import numpy as np
@@ -20,6 +24,10 @@ def auto_download_if_needed(weight_path):
     if not os.path.exists("pretrained"):
         os.makedirs("pretrained")
     
+    if weight_path == "pretrained/4x_APISR_RRDB_GAN_generator.pth":
+        os.system("wget https://github.com/Kiteretsu77/APISR/releases/download/v0.2.0/4x_APISR_RRDB_GAN_generator.pth")
+        os.system("mv 4x_APISR_RRDB_GAN_generator.pth pretrained")
+    
     if weight_path == "pretrained/4x_APISR_GRL_GAN_generator.pth":
         os.system("wget https://github.com/Kiteretsu77/APISR/releases/download/v0.1.0/4x_APISR_GRL_GAN_generator.pth")
         os.system("mv 4x_APISR_GRL_GAN_generator.pth pretrained")
@@ -28,6 +36,7 @@ def auto_download_if_needed(weight_path):
         os.system("wget https://github.com/Kiteretsu77/APISR/releases/download/v0.1.0/2x_APISR_RRDB_GAN_generator.pth")
         os.system("mv 2x_APISR_RRDB_GAN_generator.pth pretrained")
 
+    
 
 
 def inference(img_path, model_name):
@@ -41,22 +50,29 @@ def inference(img_path, model_name):
             auto_download_if_needed(weight_path)
             generator = load_grl(weight_path, scale=4)  # Directly use default way now
             
+        elif model_name == "4xRRDB":
+            weight_path = "pretrained/4x_APISR_RRDB_GAN_generator.pth"
+            auto_download_if_needed(weight_path)
+            generator = load_rrdb(weight_path, scale=4)  # Directly use default way now
+            
         elif model_name == "2xRRDB":
             weight_path = "pretrained/2x_APISR_RRDB_GAN_generator.pth"
             auto_download_if_needed(weight_path)
             generator = load_rrdb(weight_path, scale=2) # Directly use default way now
             
         else:
-            raise gr.Error(error)
+            raise gr.Error("We don't support such Model")
         
         generator = generator.to(dtype=weight_dtype)
 
 
         # In default, we will automatically use crop to match 4x size
-        super_resolved_img = super_resolve_img(generator, img_path, output_path=None, weight_dtype=weight_dtype, crop_for_4x=True)
-        save_image(super_resolved_img, "SR_result.png")
-        outputs = cv2.imread("SR_result.png")
+        super_resolved_img = super_resolve_img(generator, img_path, output_path=None, weight_dtype=weight_dtype, downsample_threshold=720, crop_for_4x=True)
+        store_name = str(time.time()) + ".png"
+        save_image(super_resolved_img, store_name)
+        outputs = cv2.imread(store_name)
         outputs = cv2.cvtColor(outputs, cv2.COLOR_RGB2BGR)
+        os.remove(store_name)
         
         return outputs
     
@@ -70,14 +86,18 @@ def inference(img_path, model_name):
     
     MARKDOWN = \
     """
-    ## APISR: Anime Production Inspired Real-World Anime Super-Resolution (CVPR 2024)
-
+    ## <p style='text-align: center'> APISR: Anime Production Inspired Real-World Anime Super-Resolution (CVPR 2024) </p>
+    
     [GitHub](https://github.com/Kiteretsu77/APISR) | [Paper](https://arxiv.org/abs/2403.01598)
-
-    If APISR is helpful for you, please help star the GitHub Repo. Thanks!
+    APISR aims at restoring and enhancing low-quality low-resolution **anime** images and video sources with various degradations from real-world scenarios.
+    
+    ### Note: Due to memory restriction, all images whose short side is over 720 pixel will be downsampled to 720 pixel with the same aspect ratio.  E.g., 1920x1080 -> 1280x720
+    ### Note: Please check [Model Zoo](https://github.com/Kiteretsu77/APISR/blob/main/docs/model_zoo.md) for the description of each weight.
+    
+    If APISR is helpful, please help star the [GitHub Repo](https://github.com/Kiteretsu77/APISR). Thanks! 
     """
 
-    block = gr.Blocks().queue()
+    block = gr.Blocks().queue(max_size=10)
     with block:
         with gr.Row():
             gr.Markdown(MARKDOWN)
@@ -87,6 +107,7 @@ def inference(img_path, model_name):
                 model_name = gr.Dropdown(
                     [
                         "2xRRDB",
+                        "4xRRDB",
                         "4xGRL"
                     ],
                     type="value",
@@ -106,7 +127,7 @@ def inference(img_path, model_name):
                     ["__assets__/lr_inputs/41.png"],
                     ["__assets__/lr_inputs/f91.jpg"],
                     ["__assets__/lr_inputs/image-00440.png"],
-                    ["__assets__/lr_inputs/image-00164.png"],
+                    ["__assets__/lr_inputs/image-00164.jpg"],
                     ["__assets__/lr_inputs/img_eva.jpeg"],
                     ["__assets__/lr_inputs/naruto.jpg"],
                 ],
@@ -115,4 +136,4 @@ def inference(img_path, model_name):
 
         run_btn.click(inference, inputs=[input_image, model_name], outputs=[output_image])
 
-    block.launch()
\ No newline at end of file
+    block.launch()