During Andres Lopez Obrador's administration a political slogan was introduced: la Ciudad de la Esperanza ("The City of Hope"). This motto was quickly adopted as a city nickname, but has faded since the new motto Capital en Movimiento ("Capital in Movement") was adopted by the administration headed by Marcelo Ebrard, though the latter is not treated as often as a nickname in media. Since 2013, to refer to the City particularly in relation to government campaigns, the abbreviation CDMX has been used (from Ciudad de Mexico).
When did the abbreviation CDMX begin to take hold?
2013

The team placed fifth in the Premier League automatically qualifies for the UEFA Europa League, and the sixth and seventh-placed teams can also qualify, depending on the winners of the two domestic cup competitions i.e. the FA Cup and the Capital One Cup (League Cup). Two Europa League places are reserved for the winners of each tournament; if the winner of either the FA Cup or League Cup qualifies for the Champions League, then that place will go to the next-best placed finisher in the Premier League. A further place in the UEFA Europa League is also available via the Fair Play initiative. If the Premier League has one of the three highest Fair Play rankings in Europe, the highest ranked team in the Premier League Fair Play standings which has not already qualified for Europe will automatically qualify for the UEFA Europa League first qualifying round.
Why is it important to have a high Fair Play ranking?
will automatically qualify for the UEFA Europa League first qualifying round

First, the Manchus had entered "China proper" because Dorgon responded decisively to Wu Sangui's appeal. Then, after capturing Beijing, instead of sacking the city as the rebels had done, Dorgon insisted, over the protests of other Manchu princes, on making it the dynastic capital and reappointing most Ming officials. Choosing Beijing as the capital had not been a straightforward decision, since no major Chinese dynasty had directly taken over its immediate predecessor's capital. Keeping the Ming capital and bureaucracy intact helped quickly stabilize the regime and sped up the conquest of the rest of the country. However, not all of Dorgon's policies were equally popular nor easily implemented.
Who made Beijing his capital?
Dorgon