From 5.5.3 version, the PDF read memory feature is supported in Kingsoft Office for Android. When you view a PDF document with Kingsoft Android Office, the application allows you to jump directly to the last viewed position page.
When you open a last viewed PDF document with Kingsoft Office, you will see a notice with blue background, something similar to "Jump to the last viewed location Page 1". Click this notice to return to the last viewed page quickly. This will save you great amount of time and effort to read PDF document.
Figure 1 PDF Read Memory