Data missing when reloading webpage with OWC spreadsheets

Hi,

I have a webpage with a statically embedded  owc spreadsheet. The spreadsheet will receive data from end users,  then the data will be processed by server side functions. However, The data will be lost when the page is reloaded after calculations. My question is how I can send those data back to spreadsheet. Of course, I have data on server side, which the spreadsheet object is only accessible by client side.

Thank you very much in advance.  
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