Sikkim joined the Indian union after a referendum, people of Sikkim actually got the right to vote and decide what they wanted for themselves. But then you are a Chinese, what would you know about voting and freedom to choose
Maintaining status quo means leaving the place as it is. The place your troops were building the road is uninhabited. The sole reason for the construction of that road was to further strengthen your military stranglehold on land that belongs to Bhutan. The road construction was being done by the Chinese army, Indian soldiers waltzed in, and asked them to piss off, which they did very obediently!
Given how treacherous the Chinese are when dealing with smaller countries( That is bullying), and their thug like behavior of dishonoring the agreement that they made with Bhutan, there is no guarantee that China will not try to pull the same stunt again in the future.
So Bhutanese and Indian soldiers will stay put. Now please ask your CPC and its mouthpieces to stop whining and whinging, frankly its very embarrassing!