How much does it cost to mail a standard letter from China to Canada, in yuan or RMB?

not really about travel but I couldn't find any suitable category|||convert to yuan honey but its like $5 canadian dollars!|||approximately 10 RMB if it is not over-weighted|||no idea|||I think it will not more than 10RMB, but it will take more than 100RMB if you mail my express letter.|||I regularly send mail to The US from Beijing,and depending on the weight of the letter it costs me anything from RMB 8 to 12($1-1.50)