Dear Ben,
We are writing you regarding our submitted article entitled ‘Update of a biogeochemical model with process-based algorithms to predict ammonia volatilization from fertilized cultivated uplands and rice paddy fields’ (manuscript number: bg-2021-341), which is currently under proof. We ask for your approval if the order of Fig. 1 and Fig. 2 could be changed. Previously, according to the reviwer's comment, we reorganized the structure of Materials and methods section to move the site description to the end of the model description. But we found that the order of the figures (i.e., Fig. 1 and Fig. 2) was not changed accordingly. It was our mistake.  But the accurate order of Fig. 1 and Fig. 2 is crucial for the readability and logicality of the manuscript. We will be most grateful if you could help to change the order of them. Thank you in advance for your understanding and kind assistance, and look forward to receiving your response soon. 

Thanks and best wishes,
Siqi
