Here is a picture I made for the Shiji-long Halloween community event, featuring Huāshé disguised as a dead dragon (only wearing a skull mask, what a lazy ass) hoarding sweets, giving them to kids. It comes along with a short story.

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“This sounds dangerous, Cháng,” Yúnbèi protested in a high pitched voice, frightened.
“It most probably is,” the older dragon answered solemnly, “but think of the reward! And I’ll protect you, so don’t worry.”
“You sure?”
Chángshé winked at his smaller comrade, and the latter felt his heart beat a little harder in his chest. With a weak smile, he nodded.
“Alright then, I trust you. Let’s do it.”
Both Shijis were young boys in their very first incarnation, and they were as close as one can be. Yúnbèi was six, two years younger than Chángshé, and had a lovely white cloud tail from which his name, “Cloud Back”, originated. The rest of his body was dark grey with lighter markings. Chángshé was born quite big for a baby and with a cleft tongue, hence his name: “Long Snake”. After several weeks, his blue fur colour appeared and made him a very weird coloured snake for sure.

This very night was Trick or Treat night. The young boys had heard about the legend of a dragon and its fabulous treasure made of chocolate and sweets, and they had found a map leading to its den. It was a very rare map, the mysterious grown-up had told them before handing it to them. It was leading them to a destination outside of the walls of Tianshu, but Chángshé was pretty sure it was still close enough not to be too dangerous. It appeared to be just next to the surrounding walls.
“There, take this sword,” the tall one said, giving Yúnbèi a wooden toy, “we have a dragon to vanquish!”
They were fully disguised as mighty warriors, proudly equipped with wooden blades and braided chestplates made of vegetal fibres, ready to fight any ferocious dragon to take its treasure and bring it back to their homes. Like true heroes do.
All geared up, each of them took a big bag and left Chángshé’s parents’ house.

For Halloween night, the whole city of Tianshu was lit with candles in orange and green paper lanterns, and fake spider webs had been spread everywhere, making the atmosphere gloomy and frightening. Most Shijis were disguised, the kids were hunting for candies while many adults were distributing them, or organising games. Chángshé and Yúnbèi walked down the streets, getting some candy in their bags, but they were going for a bigger quest: defeating a dragon and stealing its treasure. 
They soon arrived at the gates of the city, which had been left open. Outside, a path had been lit.
“Halt, children,” the guard said. “Where are you going?”
The boys hadn’t been expecting this. 
“We… Uh. We’re on a quest!” the oldest stated boldly. 
“What quest?” the guard asked.
“We’re going to defeat a dragon and steal its treasure!” Yúnbèi replied proudly with his kid’s voice.
The guard refrained from smiling and nodded gravely.
“The beast has been terrorizing the region lately. We sure could use the help of two warriors. Go ahead, follow the lit path.”
And so, the mighty heroes left the city of Tianshu for the first time of their lives. 

They soon arrived next to a dark cavern, in front of which was lying a hoard of candies, chocolate and various sweets, looking like gold in the bluish-green light cast by luminescent mushrooms.
“Look, Cháng, the treasure!” Yúnbèi shouted, amazed by the size of the hoard.
The oldest boy was impressed too, as the mountain of sweets was way too big to be harvested in both their bags. To do it justice, it was probably at least twice as high as him. They started running towards the loot with bright smiles, but suddenly, sweets began to fall from the top, and a big paw appeared on the summit, followed up by a second one, and finally by a large dragon head, looking like a frightening blemished skull. 
“Who are you, imprudent little ones? Who are you to try to steal my treasure from me?” the dragon asked in a deep, echoing voice.
Yúnbèi hid behind his young friend, hugging him from behind.
“I’m afraid, Cháng, we should go quickly!”
“I’ll protect you, Yún, don’t worry,” Chángshé said, trying to reassure both of them at the same time, feeling sorry for the small dark Shiji gripped to him.
Then, louder, he shouted, drawing his wooden sword.
“My name is Chángshé, and this is my companion Yúnbèi. We are here to claim your treasure, dragon!”
The dragon laughed, staring at the kids with his slitted eyes, and Chángshé could feel his legs shake a bit under him. 
“Then you’ll have to prove yourself worthy of it, warriors,” the dragon replied, laying on his treasure. “Lest you’ll become my dinner.”
“H-How?” the tall kid asked, still raising his wooden blade with the right hand, and holding the other kid against him with the left.
“Not with this toothpick, young one. You’ll have to sing for me.”
“Excuse me?” Chángshé asked, unsure of what he had just heard.
But the dragon didn’t reply. A deep humming rose from the beast’s throat, singing an old Tianshu melody, his eyes staring at the boys in expectation. Uncertain, the boy started singing.

“There was once a young prince, in a quest for glory.
Qiángxīn the Generous, pure of heart and mighty,
With his dear friend Lùlóng, left to slay a monster,
In a gloomy forest, where no one went ever.

They walked into a cave, filled with glowing mushrooms,
The path was dangerous, where not a flower blooms.
The creature was lurking, sometimes to them talking,
In the shadows it hid, never its face showing.”

Yúnbèi started feeling a bit better and joined his friend.

“They finally found it, on top of a treasure,
Waiting for them to come, was the scary creature.
Lùlóng was terrified, and wanted to go back,
Qiángxīn drew his large sword, preparing to attack.

Next to the hoard he saw, two eggs and a baby,
Frightened, the infant was, same as his friend Shiji.
He put his sword away, and he started singing,
To soothe his beloved friend, and the dragon youngling.

Soon the Shiji joined him, and they sang together,
Then unexpectedly, the beast joined the choir.
The unlikely trio, in the deep dark cavern,
Forgot their enmity, their fear and their concern.

Until they fell asleep, they sang as one being,
The magic of music, set up a strong binding.
Before the warriors left, the dragon gave a part,
Of its shiny treasure, for they were pure of heart.”