"We could take turns," Lan Zhan pointed out, and Wei Ying laughed, delighted, as he enveloped Lan Zhan in a sticky champagne hug.
That moment stayed with Lan Zhan.
And then the accident happened.
Jiang Cheng and Wen Chao recovers. Wei Ying doesn't.
"You'll do great, Lan Zhan," he says softly, "I believe in you."
It would be the last time Lan Zhan sees Wei Ying for years.
Jiang Cheng doesn't know this, doesn't keep quiet at how irresponsible Wei Ying is for simply disappearing. Lan Zhan has no sympathy for him.
At the end of his second season in F1, Gusu racing finally parts ways with the Jin's dubious money.
"You won't believe who they headhunted for you," their test driver Jingyi says, eyes shining.
"Lan Zhan," Wei Ying says, and somehow it's as if he's never left.
But perhaps it's not so surprising, considering how easily Wei Ying had once made himself part of his life.
"Thought no one could ever get you to smile, Senior Lan," Jingyi pokes his head from behind Sizhui, eyebrows waggling.
The thing is, they're not wrong.
He spends hours with Wei Ying on the garage, tweaking and adjusting and testing, spends days with Wei Ying's voice on his ears as Lan Zhan runs laps in their test circuit.
By his third podium finish in Baku, Lan Zhan has come to anticipate it, smiles inside the safety of his cockpit.
The Wei Ying that talks in Lan Zhan's ears as he races is a steady, unshakeable anchor.
And every time Lan Zhan feels like he's flagging, like he's slipping, Wei Ying would stop and say gently to his ears -
"Lan Zhan, I'm here."
"Thank you, for getting me through that last lap"
At the very end, Lan Zhan had three wheels and something nearing panic - Wei Ying's voice his only tether.
Lan Zhan frowns, "No," he insists, the warmth in his guts nudging him on, "I - I appreciate, like it when Wei Ying talks to me."
"Oh," Wei Ying's voice is strangely high.
"I like talking to you too," Wei Ying whispers before they both fall silent, like a stalled engine.
"Ha! But you don't need me telling you that, right? Everyone knows I like talking to you!" Wei Ying falls back into the hotel sofa, reaching for his phone.
"Ridiculous," Lan Zhan scoffs, a strange mix of relief and disappointment in his guts as he falls back into the familiar.
Then Hungaroring comes along, and for the first time after meeting him again, Wei Ying's voice falters. Their next race is Spa.
Lan Zhan finds him in the garage, surrounded by papers and screens and cans of energy drinks.
"Were you looking for me? Sorry - Oof, I know it looks a mess but don't worry, I -"
For a moment, Wei Ying merely stares at him, lips parted, before he collapses with laughter.
He waits for Wei Ying to settle down.
"Look, I know how this looks like," he sweeps a vague arm at their surroundings, "But I just -"
"I just want you safe, Lan Zhan"
"So all Wei Ying has to do is what he's always done all this time," he takes one of Wei Ying hands, squeezes it gently in his.
"Talk me through it"
He talks to Lan Zhan as rain starts to fall across the Belgian Grand Prix
Lan Zhan can barely see a thing amidst the rain, but Wei Ying's voice never once wavers.
Lan Zhan waits, confused, for Wei Ying's usual congratulations.
"Wei Ying," Lan Zhan says gently, his heart so fond and so thankful that it could burst.
"Wei Ying, I'm here."
The heat is brutal, but Wei Ying insists on staying longer during practice to scope out the track.
Something twinges inside Lan Zhan at that, something not quite like guilt.
"Hey, it's alright!" Wei Ying smiles, "After your race, I'll know this track like the back of my hand!"
"Do you miss it?"
Wei Ying's eyes are a gentle echo of the blazing sunset behind him - Patient and warm.
"But then?"
"But then, I'm still racing, right? I'm still racing with you, Lan Zhan."
Later on, no one would believe that Jingyi saw Senior Lan hugging his race engineer in the garage.
"Pays to have a good engineer, huh?" Jingyi winks at him, even as Wei Ying shushes the younger man
"Yes," he says, his tone neutral as he looks at Wei Ying, "It's good that I have the best engineer there is."
The blush on Wei Ying's cheeks makes Lan Zhan dare to hope.
It feels surreal, after only two short, rather turbulent rookie years under his belt. And he says as much to Wei Ying.
"Us," Lan Zhan is quick to amend, and feels almost smug at the pleased look in Wei Ying's eyes, "It's going to be us."
"Then let's get it."
Lan Zhan knows that he's supposed to be nervous, starting from P2, knows that with its long straights, the circuit doesn't lend itself well to overtaking.
A crash ensues on turn 8, and Wei Ying hums thoughtfully as they line up behind the safety car, cutting down his interval with the lead.
"Mn," he acknowledges.
He's quick to activate his DRS, the turn embracing them as he skirts dangerously close to the kerbs. Hears Wei Ying's drawn breath together with his own.
He flies through the remaining laps as if in a dream, the long straights now a blessing when he's leading.
"Wei Ying," he says, hoarse over the radio.
"Lan Zhan," Wei Ying, ever steadfast, replies, "Lan Zhan, I'm here."
"Oh God, Lan Zhan, do you actually still remember that?" Wei Ying's voice is strangled and wet, "Oh my God, Lan Zhan, are you laughing?"
They're probably getting broadcasted. He doesn't really care.
"Oh my God," Wei Ying says again.
Lan Zhan laughs, an easy thing now that Wei Ying is here.
He will simply race on, and have no regrets. Not while Wei Ying is by his side.
Bonus : The clips of their team radio conversation, naturally, becomes viral, and the internet just goes nuts because YOO WE BEEN KNEW THERE'S SOMETHING BETWEEN LAN ZHAN AND HIS RACE ENGINEER