Heh- ~spoiler~ Kindaaa
No, San Lang is not his real form. As you will see in the next chapter, the larger form truly is Hua Cheng. (With the eyepatch) If you have read the novel before, you will know that later in the story he will reveal his true form to Xie Lian- this is about as much as i would say incase you haven’t read it~ Im not sure if I answered your question- but i hope this helps ^^
For the majority of the stories beginning, he will be in the form of ‘San Lang’ but in future chapters, he will be in the form of ‘Hua Cheng’
(And a few more changes, but thats wayyy later ^^;;)
I will most definitely explain more if you want
https://docs.google.com/document/d/1DOHF_LchBL5h_d8EJJSmPzGsz1bPYYDcyoVKzciKalg/edit
This is the best place to read it! They have all the chapters and extras!! I 100% recommend this novel to anyone who loved BL/Shounen ai~

Can anyone spoil me which Hua Cheng form is his true form and which one he most often uses with XieLan? Because i got confused after seeing special episode trailer where he said that San Lang is his true form. (im asking bc i find his 'larger' form more emm interesting :D)