From Luohu Border can I take on arrival visa for Shenzen for 3 days ?

Luohu port at Shenzhen border does issue on-arrival visas for a less than 5 days visits within Shenzhen, but the policy is either strict or loose sometimes. My advise is that you apply for a Chian visa from the Chian embassy or consulate in your living place in Sweden ahead of your trip to guarantee a smooth trip to Shenzhen.