Yes, huajiachem.cn can receive emails.
No, huajiachem.cn is a throwaway domain and should be blocked.
You can use MailCheck's free API to automatically block throwaway emails. Read our documentation to get started. No registration required.
A record
None
MX records
mx4.chinanetsun.com
180.235.66.97
mx4a.chinanetsun.com
140.207.219.221