Regarding this issue, the following reasons may be the cause of the inability to access Taobao when connected to wireless network:

1. Weak wireless network signal: If the wireless network signal is weak, it may cause the mobile phone to be unable to connect to the network stably, and thus unable to access Taobao normally. Try moving to an area with better signal strength or closer to the wireless router, and then reconnect to the wireless network.

2. Router setting problem: Some router settings may restrict or block access to specific websites, including Taobao. Check the router settings to make sure there are no restrictions on Taobao.

3. DNS problem: DNS (Domain Name System) is a service that converts domain names into IP addresses. If there is a problem with the DNS settings of the mobile phone, it may cause the inability to resolve the domain name of Taobao, making it inaccessible. Try changing the DNS settings of the mobile phone to 8.8.8.8 (Google Public DNS) or other reliable DNS servers.

4. Router firewall settings: The firewall settings of some routers may block access to specific websites. Check the firewall settings of the router and make sure that access to Taobao is allowed.

5. Mobile phone software problem: Sometimes, certain applications on the mobile phone may interfere with access to specific websites. Try closing or uninstalling apps that may conflict with Taobao on your phone, and then try accessing Taobao again.

If the above methods still cannot solve the problem, it is recommended that you try connecting to the same wireless network with other devices, or try connecting to other wireless networks with your phone to determine whether the problem is with the phone or the network. If the problem persists, you may need to contact your network service provider or phone manufacturer for further technical support.