Wales talisman Gareth Bale wins his 100th cap but is replaced with a calf injury at half time
Aaron Ramsey scored after just two minutes to put Wales ahead before Neco Williams doubled the lead on 20 minutes
Ramsey's second goal of the night from the penalty spot puts Wales three up following Ruslan Yudenkov's handball
Ben Davies scores his first international goal on his 68th appearance for Wales to make it 4-0
Artem Kontsevoi scores spectacular consolation goal before Connor Roberts scores Wales' fifth
Image source, Getty ImagesThe Netherlands are on their way to Qatar.
Norway's surprise goalless draw against Latvia means victory will be enough to take the Netherlands through.
And they have gone ahead in Montenegro courtesy of Memphis Depay's penalty.
Wales 2-0 Belarus
Connor Roberts is typically busy down the Welsh right.
He gets up to meet Neco Williams' cross but heads over the top.
Wales 2-0 Belarus
Ruslan Yudenkov gets up highest to meet Pavel Sedko's corner, but the header is loopy and it's an easy save for Danny Ward.
Wales 2-0 Belarus
Nathan Blake
Former Wales striker on BBC Radio Wales
The anthem was like a huge choir, it sent tingles down my spine. From the get go you could feel the anticipation that it would be a fantastic night and it's been that way so far.
Wales 2-0 Belarus
That is an ugly challenge from Nikolai Zolotov.
Ben Davies is always going to win the bouncing ball.
He does just that - then gets clattered.
Zolotov is booked.
Wales 2-0 Belarus
Dafydd Pritchard
BBC Sport Wales at Cardiff City Stadium
Right, time to take Gareth Bale off now?
This is his first game back after two months, so you'd better look after that hamstring.
Wales 2-0 Belarus
Natasha Harding
Wales international on BBC Radio Wales
Gareth Bale has dragged three players in there, they're thinking he'll shoot and it's created space for Neco Williams for that goal.
Wales 2-0 Belarus
Nathan Blake
Former Wales striker on BBC Radio Wales
The keeper has had a nightmare there, Belarus' highest capped player but won't want to see that again. It's an awful mistake.
Neco Williams
Wales double their lead as Neco Williams squeezes a shot inside the near post.
Joe Allen's sharp pass starts the move, then Gareth Bale - who will be credited with an assist - feeds Williams on the left.
The Liverpool youngster cuts back onto his favoured right foot and shoots - and Sergei Chernik cannot make the save.
He might have done better. Wales don't care.
Image source, Getty ImagesWhere is Kazakhstan?
It's going to be a long night for the visitors in Paris, 2-0 down after 12 minutes with Kylian Mbappe scoring both for France.
Wales 1-0 Belarus
Nathan Blake
Former Wales striker on BBC Radio Wales
Wales will never be able to keep up this tempo, they'll need to keep the ball to take the sting out of the game and keep control.
Wales 1-0 Belarus
It is so far, so good for Wales.
They are in control against a Belarus side who, it is worth noting, have lost their last seven matches.
Wales 1-0 Belarus
Harry Wilson goes down in the box after decent work from Neco Williams.
The referee is not interested.
Wales 1-0 Belarus
A thumbs-up from Gareth Bale to a team-mate after he feeds Daniel James, but the Leeds forward's touch is loose.
Wales 1-0 Belarus
Rob Phillips
BBC Wales Football Correspondent
Ramsey, Ampadu, Allen and Wilson are all on yellows. If they get a booking tonight, they'll be suspended for Belgium on Tuesday.
Image source, Getty ImagesBelgium have taken the lead in Estonia.
It is a horrible moment for goalkeeper Matvei Igonen who lets Yannick Carrasco's low cross slip through his grasp allowing Christian Benteke the easiest of finishes from a yard out.
Wales 1-0 Belarus
Gareth Bale has been quiet so far, but his long throw goes all the way to Connor Roberts at the back post.
Roberts strikes the ball sweetly but it flashes a foot wide of the post.
Wales 1-0 Belarus
A first hint of a threat from Belarus, but Joe Rodon steps in to close the door on Kirill Pechenin.
Wales 1-0 Belarus
Nathan Blake
Former Wales striker on BBC Radio Wales
I can see Wales scoring two or three tonight, they're up for this.
Wales 1-0 Belarus
Dafydd Pritchard
BBC Sport Wales at Cardiff City Stadium
It might have been unclear before kick-off but the early exchanges show Wales are playing with a back three.
With Ethan Ampadu the right centre-back and Ben Davies on the left, there could be more scope for overlapping centre-backs.
Former Sheffield United assistant manager Alan Knill - a proponent of overlapping centre-backs under ex-Blades boss Chris Wilder - is part of Wales' coaching staff these days.