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Check out the companies making headlines before the bell rings. NetEase – Shares of the Chinese internet company fell 4% after China’s top gaming regulator promised to “further revise and improve” new rules targeting excessive gaming. NetEase shares fell 24.6% last Friday when the new guidelines were implemented. Coherus Biosciences – The biopharma stock rose 34% after the U.S. Food and Drug Administration approved Udenica OnBody, an on-body injection system that patients take along with chemotherapy to prevent infections. This injection targets febrile neutropenia, the onset of fever in a patient with abnormally low white blood cells and a common side effect in chemotherapy patients. The company expects Udenyca Onbody to be commercially available from the first quarter of next year. Amazon – The tech giant revealed that ads will be included in its Prime Video service starting January 29. Customers also have the option to pay $2.99 to opt out. Amazon shares were little changed in active premarket trading. Tesla – Shares of the electric vehicle maker rose fractionally after the company announced the revival of its Model Y vehicle, Bloomberg News reports, citing familiar sources. Tesla is expected to refresh the model from its Shanghai plant in the middle of next year.