In this whole discussion a classical mistake is made. Yes a lot of foreigners with a western origin left. But most of the foreigners in Yunnan are not western but of East Asian origin and even ethnical Chinese. A lot of western expats left because their jobs are no longer available (education) and a lot of them had no intention to stay long time in China anyway so given the present day conditions they left and didn’t return.
Most foreigners in Yunnan live in the border area and are from Myanmar, Laos and Vietnam. I presume that most of them are still there.
So the change caused by Covid and the restrictions related to jobs in education mainly effected western foreigners. It effected the inflow of people to do education here as well so a significant drop in students.
Therefor statistically the drop in “foreigners” will be only minimal while the drop in those that stand out as “foreigners” like western teachers and African students might be considerable.

The second phase of the United Nations' negotiations on the world's new biodiversity conservation goals through 2030, known as COP15, has been relocated from Kunming, Yunnan province, to the Canadian city of Montreal, between Dec 5 and 17, according to the Ministry of Ecology and Environment.

The decision was reached following consultation among the Chinese and Canadian governments and the secretariat of the UN Convention on Biological Diversity, a media release from the ministry said on Tuesday. The secretariat is based in Montreal.

With the COVID-19 pandemic control situations at home and abroad fully considered, the arrangement was made to "accelerate the global biodiversity conservation process", it said.

"China will continue to work as the presidency of the COP15," it said, adding that the theme of the gathering and its logo will remain unchanged.

The Chinese government has always attached great importance to biodiversity conservation, the statement said. With consistent efforts to play its role as the host of COP15, China, together with other parties, will endeavor to see an ambitious and realistic post-2020 global biodiversity framework reached at the meeting.

Dimitri de Boer, chief China representative of environmental law organization ClientEarth, said a lot of negotiations need to be carried out at the conference and the relocation helps address the uncertainties about the second phase of COP15. "This is very practical," he added.

As the largest UN biodiversity gathering in a decade, COP15 was originally scheduled to be held in Kunming, capital of Yunnan, in October 2020.

With the theme "Ecological Civilization: Building a Shared Future for All Life on Earth", it is tasked with elaborating on the post-2020 global biodiversity framework and identifying protection goals through 2030.

Ecological civilization is a concept promoted by President Xi Jinping for balanced and sustainable development featuring the harmonious coexistence of man and nature.

After being postponed to May 2021 due to the COVID-19 pandemic, it was rescheduled in August to be held in two phases, first in October 2021 and then in the first half of this year.

The first phase was successfully held in Kunming from Oct 11 to 15, which included the opening ceremony, leaders' speeches and the issuing of the Kunming Declaration. Overseas personnel attended the meeting online.

Via video link at the conference, Xi announced China's initiative to establish the Kunming Biodiversity Fund to support biodiversity protection in developing countries.

China took the lead in investing 1.5 billion yuan ($224 million), and called for contributions from other parties to the fund.

www.chinadaily.com.cn/[...]

@ Misfit
These numbers say little about the quality of hospital care.
In the US drug use (including alcohol) and severe obesities have a negative effect in a much higher degree than in China.

Or do as the locals. Simply connect an external battery pack to it ;-)

And an other dinosaur resurrected ;-)