diff --git a/main.py b/main.py
index 0d750b1..2ee1611 100644
--- a/main.py
+++ b/main.py
@@ -16,7 +16,7 @@ def convert_all(path = os.path.abspath('.')):
     items = os.listdir(path)
     for item in items:
         if os.path.isdir(item):
-            result = convert_img(path + '\\' + item)
+            result = convert_img(item, path + '\\' + item)
             if result == 1:
                 print("PDF 转换失败！")
                 return
@@ -26,19 +26,38 @@ def convert_all(path = os.path.abspath('.')):
     print("转换完毕！")
 
 """传入绝对路径"""
-def convert_img(path = os.path.abspath('.')):
+def convert_img(dir_name, path = os.path.abspath('.')):
     files = os.listdir(path)
+    pdf_list = []
     for file in files:
         file = file.lower()             # 排除 .PNG 等带来的问题
         if file.endswith('.pdf'):
             result = pdf2img(path, file)
             if result:                  # 1 -> Error
                 return 1
+            pdf_list.append(file)
         elif file.endswith('.jpg') or file.endswith('.jpeg'):
             img = Image.open(path + '\\' + file)
             dot_index = file.rfind('.')
-            img.save(path + '\\' + file[dot_index:] + ".png", "PNG")
-
+            img.save(path + '\\' + file[:dot_index] + ".png", "PNG")
+    if len(pdf_list) > 1:
+        print(f"注意到文件夹 {dir_name} 中有多个 .pdf 文件：")
+        for i in range(len(pdf_list)):  # 打印 pdf 文件和选项
+            print(f"{i + 1} - {pdf_list[i]}")           # 索引从 0 改为 1
+        while True:
+            invoice_index = input("请选择发票文件（输入选项前的阿拉伯数字）：")
+            if not invoice_index.isdigit():
+                print("请输入数字！")
+                continue
+            else:
+                invoice_int = int(invoice_index) - 1    # 索引从 1 改为 0
+                if invoice_int < len(pdf_list) and invoice_int >= 0:
+                    invoice_path = path + '\\' + "pdf" + pdf_list[invoice_int][:-4] + ".png"
+                    invoice_renamed = path + '\\' + 'Pdf' + pdf_list[invoice_int][:-4] + ".png"
+                    os.rename(invoice_path, invoice_renamed)    # 将 "pdf" 标签变为 "Pdf"
+                    break
+                else:
+                    print("请选择正确的序号!")
 
 def gen_filelist(path = os.path.abspath('.')):
     print("创建文件夹列表中...")
@@ -81,7 +100,7 @@ def gen_docx(path = os.path.abspath('.')):
             for dir, dir_file in file_list.items():
                 parent_path = path + '\\' + dir + '\\'
                 for file in dir_file:
-                    if file[0:3] == "pdf":
+                    if file[0:3] == "Pdf":
                         dir_file.remove(file)
                         dir_file.insert(0, file)
                 doc.add_picture(parent_path + dir_file[0], height = Inches(2.5))
diff --git a/报销程序.exe b/报销程序.exe
index 6b0dd88..48821d1 100644
Binary files a/报销程序.exe and b/报销程序.exe differ