RF487234651CN left China on Dec. 30 and still in transit to Mauritius now:
2016-12-30 14:27--Exchange Bureau in Guangzhou, have been exported directly
2016-12-30 09:46--Exchange Bureau in Guangzhou, have been exported to open
2016-12-29 18:38--Dongguan international parcel post office parcel Council group left
2016-12-29 18:35--Dongguan international parcel post office business parcel group
2016-12-29 18:23--Dongguan international parcel post office parcel Council group has received send
2016-12-28 16:33--Electronic information has been received

---------------------------------------
04392096589 couldn't be tracked when it leaves China as it's sent by China Post Ordinary Small Packet Plus. It usually takes two or more than two months to reach:
2017-01-08 15:02--Shenzhen international bulk mail processing center, left
2017-01-08 14:56--Shenzhen international bulk mail processing center,
2017-01-08 03:29--Shenzhen international bulk mail processing center has been receiving and sending
2017-01-04 11:01--Electronic information has been received

RF487234651CN in how many days will i receive it

You may receive it in the middle of February.