All mainlanders are required by Military Service Law of PRC to register for the draft when it turns 18. HKers are not required.
Again, to my understanding nowadays the PLA is a volunteer force, do correct me if wrong.
Mainland subsidies HongKong with power, food, and water.
Doesn't the central government subside a lot of smaller provinces, cities etc.
Not to mention investments in poorer regions/places.
Independent custom/immigration prevents free travel and stay within the supposedly same country between HK and mainland. Duration of stay for mainlanders in HK is much shorter than duration of stay for HKers in mainland. It's also easier for HKers to obtain a travel permit than mainland Chinese.
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Lower admission standards are not being phased out. The link is from PRC government's official site.
Huh saw some stuff about lower admission standards for universities for various regions (such as poorer ones) would be phased out. Might be more slow and gradual I suppose (decades), but I don't see these policies being in place forever.
For HK students seeking admissions to mainland institutions, The need for them to take additional required mainland examinations is eliminated, in the interest of reducing pressure.
To be honest, I see an interest for the central government to get hong kongers to mainland universities (strengthening ties to the mainland).
It doesn't mean that mainland Chinese didn't in effect accept a second class citizen status in comparison to HK citizens and Macao citizens within PRC. It was far easier for mainland Chinese to swallow their complaints and resentments before the HK protest in 2019. When it comes to Taiwan, I am not so sure especially for younger generations of Chinese (those born after 2000). Afterall, many of them grew up in much better conditions than their parents.
Again I don't actually see this as some 'second class citizens', but more like a bit of better/special treatment that is given to like the elderly and disabled lol.
Besides back in 1997 when Hong Kong came back to China it was one of the top cities, nowadays with more development from the cities on the mainland the difference has strunk a lot (not to mention while the average gdp per capita might be high for hong kong, there's a number of problems such as the 'cage houses' etc.).
In the end there will be disgruntled people on weibo and so on, but I really do not foresee it being a big problem at all.