The fast global spread of COVID-19 has resulted in the mass disruption of teaching, learning, as well as assessment, in mainstream schools in Singapore. Teachers were caught unprepared and this jeopardised the quality of classroom delivery and assessment. The Ministry of Education has since shifted to an online asynchronous mode of teaching whilst attempting to keep the face-to-face method of lesson delivery, to which it is called 'blended learning' (BL) in the local context. Besides being propelled to learn and use new technology tools for online lessons, teachers also need to quickly explore to embed formative assessment (FA) in the new BL environment to substitute traditional classroom assessment. In this context, I argue that teachers' language assessment literacy (LAL), pedagogical content knowledge (PCK) and e-pedagogy are vital to the success of embedding FA in BL. Following, I also describe some tentative predictions for future challenges and opportunities of embedding FA in the BL environment of secondary Chinese Language (CL) teaching in Singapore. On this basis, I discuss the ways in which current conceptualisations of language assessment literacy will need to shift in response to these challenges. Finally, I make some recommendations for practice based on this argument.