***** NOT A TEACHER *****
Kr. Choi,
(1) I believe that you are 100% correct.
(2) This is how Professors House and Harman explain it in their
Descriptive English Grammar:
We may say I remember the house where I was born, and use a
RELATIVE ADVERB [my emphasis] to join and relate the clauses;
or we may say I remember the house in which I was born, and use
a relative pronoun to introduce our adjective clause.
*****
Professor John B. Opdycke in his Harper's English Grammar has this
warning:
Do not use where loosely for its MORE PRECISE [my emphasis] phrase
equivalent, as This is a situation where expenditure pays or He read a
paper where he made the problem clear. In neither of these
statements is place as represented by where representative of the
meaning. They should be This is a situation in which expenditure
pays and He read a paper in which or by which or through which he
made the problem clear.
*****
It is only my opinion that your sentence is fine:
Bread Palace has set up ... in Asia, where it opened its first bakery
in Singapore.
It is only my opinion that Professor Opdycke would be very pleased with
your use of " ... a new book in which he blasts ...." And I am guessing
that the professor would also prefer in which in your sentence about the
advertisement picture.
P.S. I notice that you call "where" a relative pronoun in this kind of
adjective/relative clause. I believe that almost all books prefer to call it
a relative adverb. BUT Professor Paul Roberts in his Understanding
Grammar agrees with you that "These words [such as where] are like
relative pronouns in some respects ...."
*****
Hopefully, one of the excellent teachers at this website will give you
and me the correct answers.




