A great Postcrossing Meet Up card. It looks like about 7-8 people attended this meetup. The meetup was at the World Stamp Championship in Indonesia in 2022. World Stamp Championship? The Fédération Internationale de Philatélie (FIP) is the world federation for the study of postage stamps and postal history. It is based in Zurich, Switzerland and founded in 1926. In 2004 it ran its first World Stamp Competition in Singapore.  There are 11 FIP Commissions which deal with the following subjects: Aerophilately - air mail stamps and its history Astrophilately - stamps and postmarked envelopes that deal with spaceflight Fight Against Forgeries - philatelic fakes Maximaphily - the study and creation of maximum cards Philatelic Literature - written material related to philately, primarily about postage stamps and postal history Postal History - study of postal systems and their development Postal Stationary - stationary items, such as stamped envelopes, letter sheet, postal card, letter ca...

I love the drawing on the card. This is a canal view from Wuzhen-Zhejiang Province.  Baotou  包头市 is the second largest city in Inner Mongolia. It is hoe to 2.3 million people, while the metropolitan area has 2.7 million as of 2020. It is on the north shore of the Yellow RIver (Huanghe) - the sixth longest river on Earth. Today Baotou mines and refines over half of the rare-earth minerals produced in the world. Unfortunately this has led to environmental contamination near the industrial sites. 

Cuernavaca is home to the Palacio de Cortés. It was finished in 1535 by Herman Cortés. It is one of the oldest European-style, civil constructions in the Americas, but is executed in Renaissance style. It was the residence of Cortés and his decendants for several centuries. After it became a warehouse, a jail, a military barracks, and then the State Government Palace until 1969. From 1971-73, it was restored extensively and today houses the Museo Regional Cuauhnáhuac, dedicated to the history of Morelos. There are 10 exhibit halls with maps, illustrations, photographs, works of art, and everyday items from various epochs representing the first human settlements in the state to the present day. There are murals created by Diego Rivera that reflect both state and Mexican history. 

This vintage card is probably from the 1950's or 60's. The back says "Indian Chiefs in a native setting."

The sender writes that he is a big fan of the topic of space exploration. One of his favourite astronauts is Canadian Chris Hadfield.  Chris Hadfield (b 1959) has flown on two space shuttle missions (STS-74 and STS-100) and served as the commander of the International Space Station (ISS), getting up there on Soyuz TMA-07M. He was the first Canadian to perform extravehicular activity in space. He was accepted into the Canadian astronaut program by the Canadian Space Agency. He flew on STS-74 in 1995 as a mission specialist, visiting the Russian space station Mir. He went up on STS-100 in 2001 and walked in space to help install the Canadarm2 on the ISS. He flew up to the ISS in March 2013 and became the commander as part of Expedition 35, responsible for five astronauts and run dozens of scientific experiments. He used social media to share many of the photos he took of the Earth. He was a guest on many television news and talks shows, gaining popularity by playing the ISS guitar. H...

Troisdorf is located about 20 kilometres south of Cologne and 13 kilometres north of Bonn. There are about 77 000 people who live here. It doesn't say in the article I read, but I will guess Troisdorf is a bedroom community with many of the workers travelling to Cologne or Bonn to work.