Sh*t.

During the day, the place could even seem cute, if one did some works to the yard to make it look less abandoned, but as the sun goes down — and in that area it sets at like 4pm —, the situation changes drastically, especially as it gets night.
The complete, eerie silence of daytime is occasionally broken by bloodfreezing sounds, screeches and screams, some terrifyingly similar to people's voices. But they are in the middle of nowhere, there aren't other houses or villages anywhere near that house. So it's very unlikely it could be living people's voices.

Chan, despite being tendentially brave and having been out in the open in that cave, is completely terrified and doesn't manage to even consider to go to sleep. He curses himself for proposing to go to that place.
He is restless and doesn't even manage to sit down somewhere. He is scared both to keep the candles off and to turn them on, since that could attract creatures there.
He knows that Zhongli made the place safe, but in these situations it's hard to keep a rational thinking. He even takes his phone, considering to call his daddy to come to save him.

As he heads to the living room, he finds Jun sat by the table, quietly sipping a cup of tea as if he was the Queen of England at 5 pm in Buckingham palace.