Dear K.Ta,
According to our conversation regarding to the colour of cover board for “Next Move series”, they are yellowish. We received sample books being returned from our customer in Taiwan that we showed them to you on 26-Aug-15. We have summarized the details of each book as per attached spreadsheet.
There was this matter before, then you informed that you solved the problem by changing the supplier of cover finishing. Unfortunately, it has been happened again, especially on “Next Move WB 4”. The cover of impression no.3 (Ex-works : 02-Apr-14) is yellowish more than impression no.1 (Ex-works : 06-Mar-13).
Please investigate this matter immediately and check the book in stock for titles on attached spreadsheet.
Look forward to hearing from you soon.
Kob Kun Ka,
Thut