Databricks not able to preserve special character while writing data

[Priya_Data_Eng]

I am trying to write data in csv format 

(df. coalesce(1) write

• format("csv")
• option ("header","true")
• Option (" sep","|시")
• option("encoding", "UTF-8”)
• mode ("overwrite")
• save("/mnt/Filestore/data/job1))Now here the problem is - there is one column in this data frame df with some value starting with a ? Enclosed in square box.we can read this data from source query in this df but after writing using above code , that special character is missing in csv file. Even if I read data in databricks, this special character is missing.could you please suggest what can be the solution here to preserve this character