diff --git a/.readme_assets/screenshot_pycli.png b/.readme_assets/screenshot_pycli.png
index b1cfbbad..d5eec507 100644
Binary files a/.readme_assets/screenshot_pycli.png and b/.readme_assets/screenshot_pycli.png differ
diff --git a/cli/ccfddl/__main__.py b/cli/ccfddl/__main__.py
index 02fff853..dca71a92 100755
--- a/cli/ccfddl/__main__.py
+++ b/cli/ccfddl/__main__.py
@@ -1,5 +1,7 @@
+import string
 import requests
 import yaml
+from termcolor import colored
 from argparse import ArgumentParser
 from copy import deepcopy
 from datetime import datetime
@@ -20,15 +22,43 @@ def parse_tz(tz):
 
 def parse_args():
     parser = ArgumentParser(description="cli for ccfddl")
-    parser.add_argument("--conf", type=str)
-    parser.add_argument("--sub", type=str)
-    parser.add_argument("--rank", type=str)
-    return parser.parse_args()
+    parser.add_argument("--conf", type=str, nargs='+', 
+                        help="A list of conference ids you want to filter, e.g.: '--conf CVPR ICML'")
+    parser.add_argument("--sub", type=str, nargs='+', 
+                        help="A list of subcategories ids you want to filter, e.g.: '--sub AI CG'")
+    parser.add_argument("--rank", type=str, nargs='+', 
+                        help="A list of ranks you want to filter, e.g.: '--rank C N'")
+    args = parser.parse_args()
+    # Convert all arguments to lowercase
+    for arg_name in vars(args):
+        arg_value = getattr(args, arg_name)
+        if arg_value:
+            setattr(args, arg_name, [arg.lower() for arg in arg_value])
+    return args
+
+
+def format_duraton(ddl_time: datetime, now: datetime) -> str:
+        duration = ddl_time - now
+        months, days= duration.days // 30, duration.days
+        hours, remainder= divmod(duration.seconds, 3600)
+        minutes, seconds = divmod(remainder, 60)
+
+        day_word_str = "days" if days > 1 else "day "
+        # for alignment
+        months_str, days_str, = str(months).zfill(2), str(days).zfill(2)
+        hours_str, minutes_str = str(hours).zfill(2), str(minutes).zfill(2)
+
+        if days < 1:
+            return colored(f'{hours_str}:{minutes_str}:{seconds}', "red")
+        if days < 30:
+            return colored(f'{days_str} {day_word_str}, {hours_str}:{minutes_str}', "yellow")
+        if days < 100:
+            return colored(f"{days_str} {day_word_str}", "blue")
+        return colored(f"{months_str} months", "green")
 
 
 def main():
     args = parse_args()
-
     yml_str = requests.get(
         "https://ccfddl.github.io/conference/allconf.yml").content.decode("utf-8")
     all_conf = yaml.safe_load(yml_str)
@@ -59,18 +89,31 @@ def main():
 
     all_conf_ext = sorted(all_conf_ext, key=lambda x: x['time_obj'])
 
-    table = [["title", "sub", "rank", "ddl", "link"]]
+    # This is not an elegant solution. 
+    # The purpose is to keep the above logic untouched, 
+    # return alpha id(conf name) without digits(year)
+    def alpha_id(with_digits: string) -> string:
+        return ''.join(char for char in with_digits.lower() if char.isalpha())
+    
+    table = [["Title", "Sub", "Rank", "DDL", "Link"]]
+    # Filter intersection by args
     for x in all_conf_ext:
         skip = False
-        if args.conf and args.conf.lower() not in x["id"].lower():
+        if args.conf and alpha_id(x["id"]) not in args.conf:
             skip = True
-        if args.sub and args.sub.lower() not in x["sub"].lower():
+        if args.sub and alpha_id(x["sub"]) not in args.sub:
             skip = True
-        if args.rank and args.rank.lower() not in x["rank"].lower():
+        if args.rank and alpha_id(x["rank"]) not in args.rank:
             skip = True
-        if not skip:
-            table.append([x["title"], x["sub"], x["rank"],
-                          str(x["time_obj"] - now), x["link"]])
+        if skip:
+            continue
+        table.append(
+            [x["title"], 
+                x["sub"], 
+                x["rank"],
+                format_duraton(x["time_obj"], now),
+                x["link"]]
+            )
 
     print(tabulate(table, headers='firstrow', tablefmt='fancy_grid'))
 
diff --git a/cli/readme.md b/cli/readme.md
index 664b7581..579296cf 100755
--- a/cli/readme.md
+++ b/cli/readme.md
@@ -4,13 +4,19 @@ WIP
 
 ## install
 
-```
+```bash
 pip install -r req.txt
 python setup.py install
 ```
 
 ## usage
 
-```
+```bash
 python -m ccfddl
-```
\ No newline at end of file
+```
+
+| Argument | Type  | Description                          | Example            |
+| -------- | ----- | ------------------------------------ | ------------------ |
+| `--conf` | str[] | A list of conference IDs to filter.  | `--conf CVPR ICCV` |
+| `--sub`  | str[] | A list of subcategory IDs to filter. | `--sub AI ML`      |
+| `--rank` | str[] | A list of ranks to filter.           | `--rank A B`       |
diff --git a/cli/req.txt b/cli/req.txt
index 7934bdef..b1a4bdcb 100644
--- a/cli/req.txt
+++ b/cli/req.txt
@@ -2,3 +2,4 @@ tabulate
 yaml
 pyyaml
 requests
+termcolor