Yes, there are many strange things for foreigners here - birds, tortoises, plants, antiques (faked?) but the main reason you would want to come here is for the crickets. Cricket culture transcends generations of Chinese history and this is one unique place to experience this Chinese cricket culture. Tip : Before your trip, read up on Chinese cricket culture, watch the videos on YouTube and you will appreciate better why they do what they do in this market. Then squat beside some customers and enjoy the banter between the seller and buyer. Hint : The Chinese buy crickets either for their songs or for fights. I suspect it's the former in the market.
My mistake : I went there blind - oh, there's this Bird and Flower market - let's go see it. Then started wondering why there were so many cricket sellers and buyers. Why on earth would anyone want to buy crickets? It was only after the visit that I Googled the cricket culture to much regret. If only I had known earlier, my trip would have been all that much more meaningful.
By the way, in Google Maps, the Bird & Flower Market is reflected as 万商花鸟市场 (Wan Shang Hua Niao Shi Chang ie Wan Shang Bird & Flower Market).