There are some other constraints, for example, the constraint on textbook, authentic language
environment, learning styles, education policy and so on. Textbook easily becomes a restrict
factor when implementing communicative task, because interaction among the EFL learners
in conversation is not likely to be happened if strictly following a textbook. The teachers need
to choose relevant materials besides the textbooks and to organise interesting activities in the
CLT class (Brown & Yule, 1983). One intrinsic difference between ESL and EFL is that there
is little native language speaking environment outside the EFL class. Thus, many students in
the EFL class consider the learning is just a game which is hardly to apply the communicative
competence in real life. Richards (2008) argued that learning is not confined only the class,
but with information technique, internet, computer, and video facilities, that indeed maintain
the learning in an authentic context. Nonetheless, Hird (1995) found the students have to deal
with a lot of paper work, because both the curriculum and assessment in the Chinese national
educational system is exam-driven. Jin (2006) pointed out the learning style still relies on a
lot of memorization for most EFL students in China to learn vocabulary through memorizing.
In addition, situational factors (Yu, 2001) such as the class size, management and instruction,
learners’ proficiency level and willingness of participation will also impact the CLT in class.