Maybe there is a reason they are not making this point clear? Maybe they want more than you think they do from these big companies?
After all, Xi Jinping has a different ideology from your past leaders. He seem to be less inclined towards profit seeking private companies and more on urging these companies to be less focused on profitability and more on social responsibility or ''socialism with Chinese characteristics'' or whatever that even means. Reason he has made it clear that he wants a bigger share for state owned companies to be the dominant ones in china(even more than they are already), since they listen more to government policy/demands instead of profits. So it will be good to see how things will play out in future in this field. Since private Chinese companies have always been on the disadvantage compared to their dominant state owned counterparts since private companies received little to zero support compared to the huge favours/protection/support state owned conglomerate enjoy. So private Chinese companies have done very well to strive and grow despite all odds stacked against them actually. So for some of them to have grown so large to this extent is actually surprising. However, they have done so ONLY IN SECTORS THEY HAVE BEEN ALLOWED TO COMAPETE/TAKE PART IN. Since Chinese government forbids private companies from even getting involved in many sectors, where they maintain the monopoly of state owned companies.
So private companies in China have hustled their way out by shedding alot of sweat, especially in a quasi state dominated industry/system. Just look at how Ali pay rendered useless the other state owned financial companies who never achieved anything ground-breaking and where only seating on their ***. Ali pay changed everything when they came on and revolutionised Chinas financial payment system and made life far easier for most Chinese. If they were barred from even taking part in that sector then china's financial payment system will still be as backward/slow/inefficient and cumbersome the way it was when state owned companies dominated the market with their monopoly.
PRIVATE COMPANIES WILL ALMOST ALWAYS OUTPERFORM STATE OWNED ONES IF GIVEN A LEVEL PLAYING FIELD, OR EVEN IF GIVEN JUST AN OPPORTUNITY TO DO. So if anything the Chinese government should be encouraging it's private sector much more, not less.