This is all about me, and all about journalism. So it’s not entirely world-wide, no.

But I am seriously impressed by the system Beijing organizers have come up with for handling security for credentialed journalists.

What had become a tiresome and time-consuming hassle, since Munich and, especially, since 9/11 … has been streamlined quite cleverly by the Chinese.

Here’s how it works:

When journalists leave their official hotels … they pass through the usual “mag and bag” screening.

That’s a little strange. Every Olympics before this one, all you need to get on the bus to the venues is a credential. If I recall correctly.

The trouble, before this, came when you got to the venue. There, every arriving journalist would have to go through security before entering the venue. Any venue. Every venue. It was located outside, and the lines could be seriously nasty; inevitably, some venue didn’t have enough magnetometers and bottlenecks would occur.

And then he or she would have to go through security again when going back to the Main Press Center. Off the bus, into the mag-and-bag line.

That meant all sorts of bad things, logistically.

1. To go to the MPC, then go out and cover and event an return to the MPC, a journalist went through security three times. That could be a wasted half-hour, on some days.

2. Because most journos move around via bus, the arrival of a crowded bus, with 30, 40, 50 journalists … meant a sudden clot at the mag-and-bag tent outside the various venues. That led to reporters almost running off the bus to try to get to the top of the line — and avoid what might otherwise be a 10 or 15 minute wait.

3. Going through security is a hassle, for a reporter. You’ve got to hand over all your equipment, strip all the metal out of your pockets, and then make sure you don’t leave behind something critical. Your phone. A camera. A lens. Because the more times you’re going through security, the more likely you are to lose something. (Imagine a bunch of people at the airport with particularly exotic carry-on bags, and you begin to get the idea.)

Here is what Beijing has done.

Before you get on the bus … you go through security. At the hotel.

And if your day means going only to Olympic venues, via bus or (if they are on the Olympic Green, on foot) … you do not go through security again. Not once.

The buses you travel on, if you get them from within an Olympic venue, become a sort of rolling cordon sanitaire of security. Even though you might have traveled 20 miles, to shooting, you’ve never technically left the security perimeter because you were on the bus all the way, and it neither took on nor left off passengers.

This is revolutionary, and probably has saved tens of thousands of man hours in waiting. For journalists, anyway.

Why no one thought of this before, I don’t know.

There is one potential problem with this, and it’s on the law and order side of things.

I’m not sure what is to keep a terrorist or other crazy person from commandeering a bus … and taking it right into a venue. The buses travel alone, with no visible armed security on board, and it’s not hard to imagine a determined terrorist hijacking a bus — the soft underbelly of the system.

One more f’rinstance: If someone took over a bus on the way to the MPC, that person or persons could walk right into an area with thousands of credentialed journalists and have their way with them, until the cops arrived.

The Chinese clearly are comfortable that nothing like that is going to happen. Perhaps there are cameras I don’t see, or tailing cars.

Nothing bad has happened, so far.

And I can say with certainty that journalists — print, electronic, radio, the whole crew — love this Chinese invention. It’s a time-saving device, and a valuable one.