Fixed a few parts mentioned in previous posts.

Title: Pre-Announcement on the company's name change

We sincerely appreciate your patronage over the past years.
As a result of the expansion of our business performance, we are planning to rename our company as 新社名, replacing the current name 旧社名, as of (date).
This is to clarify our corporate identity and enhance the image of our company. Along with launching the new name and corporate identity, we will all focus on increasing the level of professionalism within our organization. We truly appreciate your continued support, just as you have supported us in the past.
We will officially announce the new name of the company as soon as it has been approved by a general meeting of stockholders on (date).

New company name: XXXX
Effective date: XXXX

>Along with launching the new name and corporate identity, we will all focus on increasing the level of professionalism within our organization.

Expanded the end to smooth out the sentence. The flow of it seemed somewhat unnatural.

>We truly appreciate your continued support, just as you have supported us in the past.

The phrasing of this is awkward. Perhaps the part after the comma could be omitted.