Coin exchange in Helsinki

Hi everyone,
I am a Chinese numismatic amateur who will study in Helsinki from May 5 to June 10. I have some Chinese and foreign coins (especially Asian ones) to exchange. You can check my exchange list on Ucoin: https://it.ucoin.net/swap-list/?uid=276606 . We can do the exchange in person if you are interested in something. Thank you very much and have a nice day.
Best regards,
Cesare