Lithium Related Media Articles, page-335

I think they are referring to the Burwill JV production line.

From Burwill's Annual Report:

In addition, Baojiang Lithium begun trial production at the end of 2018. Commissioning and processing optimization work has been organised by the production technology department. The plant has successfully produced industry-grade lithium carbonates after completing the single machine commissioning, water linkage test and feeding test. Baojiang Lithium aims to produce battery-grade lithium carbonates around the middle of 2019, so as to reach the designed capacity within the year. The product will then be available for sales after its quality is certified by end users.

Ref: https://www1.hkexnews.hk/listedco/listconews/sehk/2019/0426/ltn20190426619.pdf