No.

City

Country

Date

Haikou

1

Donghae City

Republic of Korea

Apr. 01, 2006

2

Vladimir City

Russia

Sept. 26, 2007

3

Faro City

Portugal

May 12, 2008

4

Chornomorsk City

Ukraine

Sept. 19, 2008

5

Curitiba City

Brazil

Sept. 22, 2008

6

Faiyum City

Egypt

Nov. 13, 2008

7

Tagaytay

the Philippines

Nov. 21, 2009

8

Honolulu

USA

Dec. 21, 2009

9

Scottsdale

USA

Mar. 22, 2010

10

Krabi City

Thailand

Apr. 07, 2010

11

Nanaimo

Canada

Sept. 20, 2010

12

Antalya City

Turkey

Nov. 22, 2010

13

Pisa

Italy

Nov. 25, 2010

14

Ajaccio

France

July 08, 2011

15

Rostock

Germany

Dec. 15, 2011

16

Melaka

Malaysia

Aug. 16, 2012

17

Aland Islands

Finland

June 12, 2013

18

Whangarei

New Zealand

June 11, 2014

19

Waterford

Ireland

June 20, 2014

20

Qazvin

Iran

Oct. 12, 2014

21

Haeundae Busan

Republic of Korea

Sept. 21, 2015

22

Ulaanbaatar

Mongolia

Sept. 23, 2015

23

Lahore

Pakistan

Apr. 29, 2016

24

Islamabad

Pakistan

Aug. 24, 2016

25

Tagum City

the Philippines

July 21, 2017

26

North Lombok

Indonesia

July 25, 2017

27

San Bernardino

USA

Aug. 06, 2018

28

Porte de Princesa

the Philippines

Nov. 09, 2018

29

Pokhara Lekhnath

Nepal

Nov. 16, 2018

30

Boumerdes

Algeria

Nov. 12, 2019

31

Meppel

Netherlands

Dec. 04, 2019

32

Quepos

Costa Rica

Dec. 04, 2020

Sanya

1

Gatineau

Canada

Oct. 18, 2003

2

Masan

Republic of Korea

May 18, 2003

3

Kamogawa

Japan

May 25, 2004

4

Hollywood

USA

July 03, 2006

5

Bad Kissingen

Germany

Mar. 08, 2007

6

Casares

Spain

Nov. 23, 2008

7

Miami

USA

Aug. 04, 2015

Danzhou

1

Ha Long

Vietnam

June 28, 2007

Qionghai

1

Ostrowitz

Belarus

Nov. 09, 2022

Wenchang

1

Varadero

Cuba

Sept. 26, 2000

2

Gisborne

New Zealand

Jan. 01, 2011

3

Dijon

France

Oct. 21, 2016

Wanning

1

Buckly

USA

Apr. 16, 2009

2

El Monte

USA

Oct. 11, 2018