What does DX number of Hong Kong law firm mean?

NHK: DX is the abbreviation of document exchange ... which means document exchange center ... law firm with DX number ... That is to say, they ... are members of document exchange center ... where customers can deposit money ... and exchange legal documents ... 1 and some important legal documents ... and can't let ordinary people ... or 654. 38+0 Courier's meeting ... or leaking documents ... should be highly confidential ... In short ... DX is a professional document delivery and storage company of 1 ... except for the lawyer industry ... 1 Government departments ... semi-confidential official documents ... will also use their services ... You are interested in the operation of DX ... Their web pages ... are only available in English at present ... You will find them by searching "DX Group" on the Internet ~ ... except lawyers ... who need to read legal documents because of their work ... It is not suitable for others to see ... whether it is a civil will ... or the testimony of criminal witnesses ... Handling confidential documents ~ ... and DX 009063 CENTRAL 1 (= DX membership number 009063-Central 1) ... Is it Robertson Law Firm ... located on the 57th floor ... in the central center of Queen's Road Central, central district ~ ........