2. Suits and dresses require that the fabric must be wool and pure black, and the lower body should be equipped with black shoes, black socks, white shirts and black bow ties.
3. It is not advisable to wear cloth shoes, sandals or sports shoes when wearing a suit. A solemn suit should be paired with dark brown or black leather shoes.
Extended data
Suits are also called "suits" and "dresses". Suit is a kind of "foreign culture". In China, people often call a coat with lapels and lapels, three pockets and a length below the hip line a "suit", which is obviously what China people call clothes from the west.
References:
Baidu encyclopedia-suit