diff --git a/app.py b/app.py
index 101d6d7..ca59d28 100644
--- a/app.py
+++ b/app.py
@@ -8,9 +8,9 @@ from model import Person, SexEnum, City
 app = Flask(__name__)
 config.init_config(app)
 db.init_app(app)
-# with app.app_context():
-#     print(db.session.query(City).one())
-
+db.app = app
+with app.app_context():
+    db.create_all()
 
 @app.route('/')
 def hello_world():  # put application's code here
diff --git a/service/faker_data.py b/service/faker_data.py
index f1030b1..199fba4 100644
--- a/service/faker_data.py
+++ b/service/faker_data.py
@@ -25,6 +25,11 @@ faker_hotel_infos = [
 
 faker_train_ids = ['D7359', 'T4108', 'D776', 'D3023', 'K1461', 'L1500', 'G662']
 
+ident_valid_ratio = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]
+ident_valid_result = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2']
+ident_area = ['320700', '320722', '320707', '320723', '320724', '320706', '320703', '320500', '320581', '320582',
+              '320583', '320506', '320505', '320509', '320585', '320507', '320508']
+
 
 # Due to the limit of reptile, turn to query the city by city code
 @deprecated
@@ -46,16 +51,22 @@ def faker_identification_old() -> Person:
 
 
 def faker_identification() -> Person:
-    identification = faker.ssn(max_age=70)
-    birthday = parser.parse(identification[6:14])
-    age = rrule.rrule(rrule.YEARLY, dtstart=birthday, until=datetime.today())
+    area = ident_area[random.randint(0, len(ident_area) - 1)]
+    birthdate = datetime(
+        year=2022 - random.randint(18, 70),
+        month=random.randint(1, 12),
+        day=random.randint(1, 28)
+    )
+    birthday = birthdate.__format__("%Y%m%d")
+    random_num = random.randint(100, 999).__str__()
+    identification = area + birthday + random_num
+    valid = ident_valid_result[sum([int(identification[i]) * ident_valid_ratio[i] for i in range(17)]) % 11]
+    identification = identification + valid
+    birthdate = parser.parse(identification[6:14])
+    age = rrule.rrule(rrule.YEARLY, dtstart=birthdate, until=datetime.today()).count()
     sex = 0 if int(identification[16:17]) % 2 == 0 else 1
-    # Better out of cycle
-    city = db.session.query(City).filter(City.ad_code == identification[0:6]).one()
-    address = '{} {} {} {}'.format(city.country_cn, city.province_cn, city.admin_district_cn, city.city_cn)
     return Person(
         identification=identification,
-        address=address,
         sex=sex,
         name=faker.last_name() + (faker.first_name_male() if sex == SexEnum.MALE.sex else faker.first_name_female()),
         age=age,
@@ -64,18 +75,20 @@ def faker_identification() -> Person:
 
 
 def faker_identifications(num: int) -> list[Person]:
-    all_tasks = [executor.submit(faker_identification) for i in range(num)]
-    futures = as_completed(all_tasks)
-    persons = [future.result() for future in futures]
-    db.session.add_all(persons)
-    db.session.commit()
+    persons = [faker_identification() for i in range(num)]
+    area_codes = [person.identification[0:6] for person in persons]
+    rows = City.query.filter(City.ad_code.in_(area_codes))
+    code_area_dict = {row.ad_code: '{} {} {} {}'.format(row.country_cn, row.province_cn, row.admin_district_cn, row.city_cn) for row in rows}
+    for person in persons:
+        person.address = code_area_dict[person.identification[0:6]]
+    db.session.bulk_save_objects(persons)
     return persons
 
 
 def faker_railways(num: int) -> list[Railway]:
     persons = faker_identifications(num)
     railways = [faker_railway(person) for person in persons]
-    db.session.add_all(railways)
+    db.session.bulk_save_objects(railways)
     db.session.commit()
     return railways