Within C-ent the S-level drama production means the highest level of money investment so the biggest budget basically. Investment comes from the production company going out to get investors, it’s rare for a production company to cover the entire cost of the budget. Afterwards the drama is sold to platforms and also sells commercials and if it’s a success the investors share in the profits. A star is considered to have made it when he/she is top billed in a S-level drama and even getting second billing is fantastic for any rising actor or actress. Yang Yang and Jin Chen recently wrapped filming for The Immortal Ascension (A Record of a Mortal’s Journey to Immortality) based on a popular IP so the drama was already high profile. But now it’s even more primed to succeed as the production recently got additional investors so the drama budget has gone up and is now considered a S-level production. The additional money will be spent on post-production with the special effects and other clean up work to make this drama look top notch.