The interviewer was very willing to answer the questions you asked.

The benefits are so limited that the only employee gathering is the year-end banquet; other benefits are provided according to the requirements of the Labor Standards Act.

After asking, I learned that, basically, there is overtime every month (for the position I interviewed for).

After the interview, the interviewer was casual in their attitude when seeing me off (could this possibly be considered an advantage of the office culture?).

In summary, the benefits are very limited.