If using your devices on-line using a public WiFi hotspot, you would be very wise to use a paid VPN product from a provider with a good reputation. There are many to choose from, but a very good option (with an exceeding good Black Friday deal over this weekend) is hide.me VPN; one “premium” subscription will cover up to 10 devices. Hide.me also offer a trustworthy free service - limited to a relatively generous 2GB per month per account. That said, in general you should avoid [as in, do not trust] the majority of “free” VPN services.
Additionally, if not using a trusted VPN solution, you would be well advised to manually override your DNS settings - and use either Quad9 DNS (9.9.9.9 & 149.112.112.112) or Cloudflare DNS (1.1.1.1 & 1.0.0.1). This will help to prevent DNS hijacking - and help prevent malicious content from reaching your devices. This measure costs you nothing but a few seconds of time - but the settings will have to be repeated for each WiFi network you join (it is possible to automate this, but the description of “how” is somewhat beyond the scope of this discussion thread).
One final measure to consider is downloading 1Blocker from the App Store. This is a sophisticated content filter and blocker - for both iPad/iPhone and Mac. Without purchasing the optional subscription, it is free to use - but the enhanced functionality included with the subscription is well worth the outlay (and recommended) if you can stretch to it.
I hope you find this advice helpful. Have a great and cyber-safe trip to the Far East!