Referee’s Report. The details are as follows: Question list: i) English usage. ii) the transition observed at around 280 K iii) Why use melt-spun samples and why the samples are of such high quality? iv) The references. v) The introduction. vi) The explanation of the change of transition temperature. Answer: i) Apart from mistakes you list, I have also made some other corrections on the English usage in my manuscript and had it further revised by a native English speaking person. ii) I have stated the reason for giving no details about the structure of the low temperature phase and a similar transition in related compound has been also presented in my manuscript. iii) The reason for using melt-spun samples in this work is that the melt-spinning technique can obtain a high chemical ordering ** structure and a good quality of**compared to the conventional arc-melting method. I have explained this point in my manuscript. iv) The references have been made complete. v) I have revised the introduction according to your advice. vi) I can’t offer a satisfactory explanation of the change of transition temperature at present. Further work is needed to investigate this behavior deeply and I have stated this point in my manuscript. Yours sincerely ××