Personally developed app, uses personally owned domain names. Are there any restrictions on domain names when filing for the record?

app, developed by individuals uses individual-owned domain names. Are there any restrictions on domain names when filing for the record? For example, this app can only be a tool class or are there any other restrictions?

Apr.28,2021

filing is related to the resolution of domestic dns service providers. It has nothing to do with anything else

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e50e15-450f2.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e50e15-450f2.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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