Tier 7 Clarification

Ok, so i play alot of Xin, i have my shards, im t6 already, i have the 3/3 for t7 Xin already..... I own Xin Zhao.. What is missing from the crafting list as i have 312 blue (need 500) i own Xin (What is permanent?) or Champion Shard (which is useless if you own him, gets broken into blue...) what am i not understanding to rank up to t7?
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