a tip for save money in UK

Living in UK for more than two years, I got some tips for saving money on distance calls. There are two phone numbers that you can dial directly to China for very low rate, interested ones can have a try.
08707946195
08445706195
The fee is only 2P/M
one is for week days and the other one is for weekend.
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Sorry,I forgot which one is for which day...everybody has to find it out by yourself...