diff --git a/loader/data_loader.py b/loader/data_loader.py
new file mode 100644
index 0000000..6b17f9b
--- /dev/null
+++ b/loader/data_loader.py
@@ -0,0 +1,72 @@
+import json
+import os
+
+
+DATAS_CONFIG = "./datas.json"
+
+
+class INGDataLoader():
+    def __init__(self, config_path: str=DATAS_CONFIG) -> None:
+        self._path = config_path
+        with open(config_path, 'r', encoding='utf-8') as config:
+            data = json.load(config)
+            self.top_level_path:str = data["cp_path"]
+            self.datasets:dict = data["datasets"]
+            self.id_table = {
+                v["id"]: k for (k, v) in self.datasets.items()
+            }
+    
+    def body_extractor(self, target: str) -> list:
+        if target not in self.datasets:
+            print(f"{target} is not included in datas.json as a dataset")
+            return None
+        configs = self.datasets[target]
+        tag = configs["tag"]
+        body = []  # may get a bit huge... 
+        full_path = os.path.join(self.top_level_path, configs["path"])
+        if os.path.isfile(full_path):  # single file json
+            with open(full_path, mode='r', encoding='utf-8') as file:
+                data = json.load(file)
+                for poem in data:
+                    body += poem[tag]
+            return body
+        # a dir, probably with a skip list
+        subpaths = os.listdir(full_path)
+        for filename in subpaths:
+            if filename in configs["excludes"]:
+                continue
+            with open(os.path.join(full_path, filename), mode='r', encoding='utf-8') as file:
+                data = json.load(file)
+                for poem in data:
+                    body += poem[tag]
+        return body
+
+    def extract_from_multiple(self, targets: list) -> list:
+        results = []
+        for target in targets:
+            results += self.body_extractor(target)
+        return results
+    
+    def extract_with_ids(self, ids: list) -> list:
+        results = []
+        for id in ids:
+            results += self.body_extractor(
+                self.id_table[id]
+            )
+        return results
+
+
+
+if __name__ == "__main__":
+    loader = INGDataLoader()
+    print(loader.id_table)
+    print(
+        loader.body_extractor("wudai-huajianji")[-1]
+    )
+    print(
+        len(loader.extract_from_multiple(["wudai-huajianji", "wudai-nantang"]))
+    )
+    print(
+        loader.extract_with_ids([0, 1, 2])
+    )
+
diff --git a/loader/datas.json b/loader/datas.json
new file mode 100644
index 0000000..6a2477f
--- /dev/null
+++ b/loader/datas.json
@@ -0,0 +1,94 @@
+{
+    "cp_path": "./data/chinese-poetry/", 
+    "datasets": {
+        "wudai-huajianji": {
+            "name": "五代-花间集",
+            "id": 0,
+            "path": "五代诗词/huajianji/", 
+            "excludes": ["README.md"],
+            "tag": "paragraphs"
+        },
+        "wudai-nantang": {
+            "name": "五代-南唐",
+            "id": 1, 
+            "path": "五代诗词/nantang/poetrys.json",
+            "tag": "paragraphs"
+        },
+        "yuanqu": {
+            "name": "元曲",
+            "id": 2,
+            "path": "元曲/yuanqu.json",
+            "tag": "paragraphs"
+        },
+        "tangsong": {
+            "name": "全唐诗全宋诗",
+            "id": 3,
+            "path": "全唐诗/",
+            "excludes": ["README.md", "表面结构字.json", "error/", "authors.song.json", "authors.tang.json"],
+            "tag": "paragraphs"
+        },
+        "mengzi": {
+            "name": "四书五经-孟子", 
+            "id": 4,
+            "path": "四书五经/mengzi.json",
+            "tag": "paragraphs",
+            "comments": "四书五经的其他文件不符合两层结构, 以后再想办法处理吧."
+        },
+        "songci": {
+            "name": "宋词",
+            "id": 5,
+            "path": "宋词/",
+            "excludes": ["authors.song.json", "ci.db", "main.py", "README.md", "UpdateCi.py"],
+            "tag": "paragraphs"
+        },
+        "youmengying": {
+            "name": "幽梦影-张潮文集",
+            "id": 6,
+            "path": "幽梦影/youmengying.json",
+            "tag": "content"
+        },
+        "yudingquantangshi": {
+            "name": "御定全唐诗",
+            "id": 7,
+            "path": "御定全唐诗/json/",
+            "tag": "paragraphs"
+        },
+        "caocao": {
+            "name": "曹操诗集",
+            "id": 8,
+            "path": "曹操诗集/caocao.json",
+            "tag": "paragraphs"
+        },
+        "chuci": {
+            "name": "楚辞",
+            "id": 9,
+            "path": "楚辞/chuci.json",
+            "tag": "content"
+        },
+        "shuimotangshi": {
+            "name": "水墨唐诗",
+            "id": 10,
+            "path": "水墨唐诗/shuimotangshi.json",
+            "tag": "paragraphs"
+        },
+        "nalanxingde": {
+            "name": "纳兰性德",
+            "id": 11,
+            "path": "纳兰性德/纳兰性德诗集.json",
+            "tag": "para",
+            "comments": "蒙学文件夹下的非常规格式文件没有包括在这个json中"
+        },
+        "lunyu": {
+            "name": "论语",
+            "id": 12,
+            "path": "论语/lunyu.json",
+            "tag": "paragraphs"
+        },
+        "shijing": {
+            "name": "诗经",
+            "id": 13,
+            "path": "诗经/shijing.json",
+            "tag": "content"
+        }
+    }
+}
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