alt Hacker NewsI think OP's point is that a "99 year lease" isn't worth very much without a firm guarantee that the least in fact lasts that long. I don't really have an opinion on land leases in the PRC, but it doesn't seem facially unreasonable to suspect that a foreign lease holder's land value wouldn't be a priority for China's leadership during an economic crisis.
This is on full display with the US's Venezuela problem: no one believes the US will hold it, so oil companies don't want to invest because last time exactly this happened - they had everything seized.
Imagine if you'd invested in lithium mining in Afghanistan 15 years ago: you'd likely have paid a lot, made little money, lost employees and then lost it to the Taliban.