$Sea Ltd(SE)$ SE is facing competition from Tik Tok shop but I believe in 2-3 years, SE will prevail, reason being what is observed from China. 

SE has both product search ecommerce and livestream ecommerce and is not dependent on only one type. 

From recent reports from China, livestream ecommerce can generate a lot of sales but the return rate can be 60% due to impulsive buying. Now if the infrastructure isn't there, who will bear the cost of returns? This means the cost per transaction is high, if you include returns. Then for livestreamers, they take commissions, so who pay for commissions? It will be shared by buyers and sellers, so the cost or price of products will need to be higher or seller will have a lower margin but sell more. Then for fulfillment, if sales more than what suppliers can provide, customers will be unhappy for the long delivery times. If suppliers reserve a large inventory, but cannot sell, then sellers have to bear more inventory costs. 

Now in China, sellers are less willing to work with livestreaming influencers, particular for selling at prices less than physical stores which cannibalise sales at physical stores.