How to write the relationship certificate between foreign companies and domestic companies?

This is to certify that XX Company and XX Company belong to the same company. In addition, the addresses and legal representatives of the two companies should be attached and signed and sealed. (Signed by two companies as legal persons, sealed by two companies) Template of company relationship certificate: Due to business needs, cleaning personnel are specially recruited for our foreign company, and this recruitment has full authority to recruit personnel for our company. I look forward to your approval. Thank you. Related party (seal). Fill in the date.