With the current pacing of the series, it looks impossible that they will cover gao&shen's storyline fully in 6 episodes. In the concept trailer(10 minutes long) we see gao leaving with boxes yet there is no mention of any reunion happening. Im guessing that they will cover hua&sheng's storyline fully and end the secondary couple on a bittersweet tone. Depending on the production team and the requests of the fans, they can produce a second season but I am not so sure. What do you think?  

Im not sure but i remember seeing a short video of the actors acting and the bts scene was Shen hugging GaoTu while GaoTu looking shocked, i thought it might be a scene in the final ep after reunion but i might be wrong

so i searched again to find it, and here is the short video that i have seen  (anyone who is checking, please only click if you are okay about getting spoiled as this short video contain spoiler)

https://www.youtube.com/shorts/AyNQiEH3EP4