Countries spy on foreign visitors. Friendship trips are carefully planned to show none of the underside of a society. China is one of the most oppressive regimes out there - see the detention of Jack Ma, who was five years ago one of their most celebrated businessmen.
The naïveté is not understanding that China’s problems is not so much they are evil masterminds rather than just incompetent bureaucrats. The takeaway from the trip is that 90% of what they expose to the outside world is a facade to save face for their own politicians, not that they are competent super spies.
They may have spied on us, but we’d have not much value being spied upon. If spying is somehow the benchmark of authoritarian regimes then the US and Israel probably lead the pack of these types of regimes.
Secondly, just because you disagree with government policies doesn’t make it some evil regime. You cited Jack Ma but he is still out and about.
We’ve seen enough already.
But I agree, for any random foreigner the government is not competent enough to surveil him/her and much less motivated to do so. The fact is any given foreigner is not actually that important...
Japan had a similar problem being previously not very rich (they invented kotatsu for that reason).
Even if “every step is observed” is exaggerated, the surveillance system in China is pretty extensive: it can target journalists and international students among other “suspicious people”, and can compile individual files on such persons using 3,000 facial recognition cameras (in a single province) that connect to various national and regional databases. [1]
And this surveillance system is part of the bigger tracking program, which the Chinese authority has used to harass and intimidate journalists [2] (see this comment for more [3]).
And according to the memoir “A Promised Land”, even Obama and his staff were worried about Chinese surveillance during their stay at the Beijing hotel (see this review [4] or this summary [5]):
“To make calls involving national security matters from the hotel, I had to go to a suite down the hall fitted with a sensitive compartmented information facility (SCIF) — a big blue tent plopped down in the middle of the room that hummed with an eerie, psychedelic buzz designed to block any nearby listening devices. Some members of our team dressed and even showered in the dark to avoid the hidden cameras we could assume had been strategically placed in every room. (Marvin, on the other hand, said he made a point of walking around his room naked and with the lights on — whether out of pride or in protest wasn’t entirely clear.)” [4]
And I agree with other commenters [6] that the situation worsened significantly after 2018 as Xi was consolidating power, so experiences before 2016 or so may not be representative of the current trend (when Xi may get more terms).[1]: https://www.reuters.com/technology/exclusive-chinese-provinc... "EXCLUSIVE Chinese province targets journalists, foreign students with planned new surveillance system"
[2]: https://www.newsweek.com/china-harassing-intimidating-journa... "China Harassing, Intimidating Journalists With Surveillance Built to Curb COVID-19"
[3]: https://news.ycombinator.com/item?id=29685703
[4]: https://georgetoparis.medium.com/obamas-a-promised-land-on-c... "Obama’s “A Promised Land”, on China"
[5]: https://www.bannedbook.org/en/bnews/baitai/20201121/1434392.... "Obama recalls his first visit to China and was under surveillance"