2 different visas but using one?

Hi, I'm from Spain and I applyed for the X1 type for students for a period longer than 180 days. I'll go to Shanghai the 11th of August, the problem is that I have another trip to Vietnam the 16th, and I come back to Shanghai the 30th. The X1 type just allows me one enter, I would need a Resident Permission to enter the second time but I won't have enough time for that before the 16th.
My cuestion is, can I apply for a tourist L type now, here in Spain, and use it on the first entry to China, and reserve the other one, the X1 for students, for the second time?