Co-chairman of ITU-T SG16 Metaverse Correspondence Group. Mainly engaged in standardization of Metaverse, blockchain, information security, etc. Served as ITU-T SG17 WP4 chairman, IETF ACE WG co-chair, OMA CD WG chair, etc.
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| Country or Area | ISO-alpha2 Code | ISO-alpha3 Code | Developed / Developing regions |
| Algeria | DZ | DZA | Developing |
| Egypt | EG | EGY | Developing |
| Libya | LY | LBY | Developing |
| Morocco | MA | MAR | Developing |
| Sudan | SD | SDN | Developing |
| Tunisia | TN | TUN | Developing |
| Western Sahara | EH | ESH | Developing |
| British Indian Ocean Territory | IO | IOT | Developing |
| Burundi | BI | BDI | Developing |
| Comoros | KM | COM | Developing |
| Djibouti | DJ | DJI | Developing |
| Eritrea | ER | ERI | Developing |
| Ethiopia | ET | ETH | Developing |
| French Southern Territories | TF | ATF | Developing |
| Kenya | KE | KEN | Developing |
| Madagascar | MG | MDG | Developing |
| Malawi | MW | MWI | Developing |
| Mauritius | MU | MUS | Developing |
| Mayotte | YT | MYT | Developing |
| Mozambique | MZ | MOZ | Developing |
| Réunion | RE | REU | Developing |
| Rwanda | RW | RWA | Developing |
| Seychelles | SC | SYC | Developing |
| Somalia | SO | SOM | Developing |
| South Sudan | SS | SSD | Developing |
| Uganda | UG | UGA | Developing |
| United Republic of Tanzania | TZ | TZA | Developing |
| Zambia | ZM | ZMB | Developing |
| Zimbabwe | ZW | ZWE | Developing |
| Angola | AO | AGO | Developing |
| Cameroon | CM | CMR | Developing |
| Central African Republic | CF | CAF | Developing |
| Chad | TD | TCD | Developing |
| Congo | CG | COG | Developing |
| Democratic Republic of the Congo | CD | COD | Developing |
| Equatorial Guinea | GQ | GNQ | Developing |
| Gabon | GA | GAB | Developing |
| Sao Tome and Principe | ST | STP | Developing |
| Botswana | BW | BWA | Developing |
| Eswatini | SZ | SWZ | Developing |
| Lesotho | LS | LSO | Developing |
| Namibia | NA | NAM | Developing |
| South Africa | ZA | ZAF | Developing |
| Benin | BJ | BEN | Developing |
| Burkina Faso | BF | BFA | Developing |
| Cabo Verde | CV | CPV | Developing |
| Côte d’Ivoire | CI | CIV | Developing |
| Gambia | GM | GMB | Developing |
| Ghana | GH | GHA | Developing |
| Guinea | GN | GIN | Developing |
| Guinea-Bissau | GW | GNB | Developing |
| Liberia | LR | LBR | Developing |
| Mali | ML | MLI | Developing |
| Mauritania | MR | MRT | Developing |
| Niger | NE | NER | Developing |
| Nigeria | NG | NGA | Developing |
| Saint Helena | SH | SHN | Developing |
| Senegal | SN | SEN | Developing |
| Sierra Leone | SL | SLE | Developing |
| Togo | TG | TGO | Developing |
| Anguilla | AI | AIA | Developing |
| Antigua and Barbuda | AG | ATG | Developing |
| Aruba | AW | ABW | Developing |
| Bahamas | BS | BHS | Developing |
| Barbados | BB | BRB | Developing |
| Bonaire, Sint Eustatius and Saba | BQ | BES | Developing |
| British Virgin Islands | VG | VGB | Developing |
| Cayman Islands | KY | CYM | Developing |
| Cuba | CU | CUB | Developing |
| Curaçao | CW | CUW | Developing |
| Dominica | DM | DMA | Developing |
| Dominican Republic | DO | DOM | Developing |
| Grenada | GD | GRD | Developing |
| Guadeloupe | GP | GLP | Developing |
| Haiti | HT | HTI | Developing |
| Jamaica | JM | JAM | Developing |
| Martinique | MQ | MTQ | Developing |
| Montserrat | MS | MSR | Developing |
| Puerto Rico | PR | PRI | Developing |
| Saint Barthélemy | BL | BLM | Developing |
| Saint Kitts and Nevis | KN | KNA | Developing |
| Saint Lucia | LC | LCA | Developing |
| Saint Martin (French Part) | MF | MAF | Developing |
| Saint Vincent and the Grenadines | VC | VCT | Developing |
| Sint Maarten (Dutch part) | SX | SXM | Developing |
| Trinidad and Tobago | TT | TTO | Developing |
| Turks and Caicos Islands | TC | TCA | Developing |
| United States Virgin Islands | VI | VIR | Developing |
| Belize | BZ | BLZ | Developing |
| Costa Rica | CR | CRI | Developing |
| El Salvador | SV | SLV | Developing |
| Guatemala | GT | GTM | Developing |
| Honduras | HN | HND | Developing |
| Mexico | MX | MEX | Developing |
| Nicaragua | NI | NIC | Developing |
| Panama | PA | PAN | Developing |
| Argentina | AR | ARG | Developing |
| Bolivia (Plurinational State of) | BO | BOL | Developing |
| Bouvet Island | BV | BVT | Developing |
| Brazil | BR | BRA | Developing |
| Chile | CL | CHL | Developing |
| Colombia | CO | COL | Developing |
| Ecuador | EC | ECU | Developing |
| Falkland Islands (Malvinas) | FK | FLK | Developing |
| French Guiana | GF | GUF | Developing |
| Guyana | GY | GUY | Developing |
| Paraguay | PY | PRY | Developing |
| Peru | PE | PER | Developing |
| South Georgia and the South Sandwich Islands | GS | SGS | Developing |
| Suriname | SR | SUR | Developing |
| Uruguay | UY | URY | Developing |
| Venezuela (Bolivarian Republic of) | VE | VEN | Developing |
| Kazakhstan | KZ | KAZ | Developing |
| Kyrgyzstan | KG | KGZ | Developing |
| Tajikistan | TJ | TJK | Developing |
| Turkmenistan | TM | TKM | Developing |
| Uzbekistan | UZ | UZB | Developing |
| China | CN | CHN | Developing |
| China, Hong Kong Special Administrative Region | HK | HKG | Developing |
| China, Macao Special Administrative Region | MO | MAC | Developing |
| Democratic People’s Republic of Korea | KP | PRK | Developing |
| Mongolia | MN | MNG | Developing |
| Brunei Darussalam | BN | BRN | Developing |
| Cambodia | KH | KHM | Developing |
| Indonesia | ID | IDN | Developing |
| Lao People’s Democratic Republic | LA | LAO | Developing |
| Malaysia | MY | MYS | Developing |
| Myanmar | MM | MMR | Developing |
| Philippines | PH | PHL | Developing |
| Singapore | SG | SGP | Developing |
| Thailand | TH | THA | Developing |
| Timor-Leste | TL | TLS | Developing |
| Viet Nam | VN | VNM | Developing |
| Afghanistan | AF | AFG | Developing |
| Bangladesh | BD | BGD | Developing |
| Bhutan | BT | BTN | Developing |
| India | IN | IND | Developing |
| Iran (Islamic Republic of) | IR | IRN | Developing |
| Maldives | MV | MDV | Developing |
| Nepal | NP | NPL | Developing |
| Pakistan | PK | PAK | Developing |
| Sri Lanka | LK | LKA | Developing |
| Armenia | AM | ARM | Developing |
| Azerbaijan | AZ | AZE | Developing |
| Bahrain | BH | BHR | Developing |
| Georgia | GE | GEO | Developing |
| Iraq | IQ | IRQ | Developing |
| Jordan | JO | JOR | Developing |
| Kuwait | KW | KWT | Developing |
| Lebanon | LB | LBN | Developing |
| Oman | OM | OMN | Developing |
| Qatar | QA | QAT | Developing |
| Saudi Arabia | SA | SAU | Developing |
| State of Palestine | PS | PSE | Developing |
| Syrian Arab Republic | SY | SYR | Developing |
| Turkey | TR | TUR | Developing |
| United Arab Emirates | AE | ARE | Developing |
| Yemen | YE | YEM | Developing |
| Fiji | FJ | FJI | Developing |
| New Caledonia | NC | NCL | Developing |
| Papua New Guinea | PG | PNG | Developing |
| Solomon Islands | SB | SLB | Developing |
| Vanuatu | VU | VUT | Developing |
| Guam | GU | GUM | Developing |
| Kiribati | KI | KIR | Developing |
| Marshall Islands | MH | MHL | Developing |
| Micronesia (Federated States of) | FM | FSM | Developing |
| Nauru | NR | NRU | Developing |
| Northern Mariana Islands | MP | MNP | Developing |
| Palau | PW | PLW | Developing |
| United States Minor Outlying Islands | UM | UMI | Developing |
| American Samoa | AS | ASM | Developing |
| Cook Islands | CK | COK | Developing |
| French Polynesia | PF | PYF | Developing |
| Niue | NU | NIU | Developing |
| Pitcairn | PN | PCN | Developing |
| Samoa | WS | WSM | Developing |
| Tokelau | TK | TKL | Developing |
| Tonga | TO | TON | Developing |
| Tuvalu | TV | TUV | Developing |
| Wallis and Futuna Islands | WF | WLF | Developing |
New membership are not allowed.
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