我怎样才能把“”--空格--放在第七个字符里？

def insert_space(string):
    if len(string) >= 7:
        first_six_chars = string[:6]
        remaining_chars = string[6:]
        new_string = first_six_chars + " " + remaining_chars
        return new_string
    else:
        return "输入字符串长度不足7个字符"

# 示例调用
input_string = "我怎样才能把空格放在第七个字符里？"
result = insert_space(input_string)
print(result)