How to recover these deleted archives to the best possible level

This is an important issue: How to recover these deleted archives to the best possible level?  Time is running against the justice.  參與過64鎮壓的解放軍將士全部去除檔案中相關的記載.

US has a National Archive collection.  There is no way the current chinese governoment will archive files related to 64. 

A possible way is grass root try to organize (donote money and time, form a trust) to collect files, validate them, and archive as records.